64th BPSC Prelims 2018 Part 3 Question Paper with Answers and Solutions (Solved)

🏅 18th Asian Games, 2018 — Jakarta and Palembang

India won a total of 69 medals at the 18th Asian Games, held in Indonesia from 18 August to 2 September 2018. The correct medal distribution was 15 Gold, 24 Silver and 30 Bronze. India secured the 8th position in the final medal tally. The total can be verified by adding the three categories: 15 + 24 + 30 = 69.

📊 India’s Medal Tally

🌏 Important Facts about the 2018 Asian Games

• Host country: Indonesia.
• Host cities: Jakarta and Palembang.
• Edition: 18th Asian Games.
• Dates: 18 August – 2 September 2018.
• Motto: Energy of Asia.
• India’s position: 8th in the medal table.
• India’s total medals: 69, its highest medal tally at the Asian Games up to that edition.
• First Indian woman to win Asian Games gold in wrestling: Vinesh Phogat.
• First Indian to win Asian Games gold in javelin throw: Neeraj Chopra.
• India’s gold medal tally: 15, matching its gold medal tally at the inaugural Asian Games in 1951.

📈 Comparison of India’s Asian Games Performance

🧠 Extra Exam-Oriented Facts

• The 19th Asian Games were held in Hangzhou, China, in 2023, although originally scheduled for 2022.
• India won 107 medals at Hangzhou 2023: 28 gold, 38 silver and 41 bronze.
• The Asian Games are organised by the Olympic Council of Asia (OCA).
• The first Asian Games were held in New Delhi in 1951.
• The Asian Games are generally held once every four years.

Quick Revision: Asian Games 2018 → Indonesia → Jakarta and Palembang → India: 15 Gold + 24 Silver + 30 Bronze = 69 medals → 8th position.

✔️ Final Answer: (D) 15 Gold, 24 Silver, 30 Bronze, Total 69

✈️ India’s First Biofuel-Powered Flight

SpiceJet became the first Indian airline to operate a flight powered by a blend of conventional Aviation Turbine Fuel (ATF) and biojet fuel on 27 August 2018. The demonstration flight operated from Dehradun to Delhi using a Bombardier Q400 aircraft. The fuel blend consisted of 75% conventional ATF and 25% biojet fuel.

🌱 What Is Biojet Fuel?

Biojet fuel is a type of Sustainable Aviation Fuel (SAF) produced from renewable biological resources. Depending on the production technology, its feedstock can include non-edible oils, agricultural residues, used cooking oil and other suitable biomass. It can be blended with conventional aviation turbine fuel, subject to applicable technical standards and approvals.

📊 Important Details of the 2018 Flight

🔬 Role of CSIR–Indian Institute of Petroleum

• CSIR: Council of Scientific and Industrial Research, an autonomous research and development organisation under the Government of India.
• CSIR-IIP: Indian Institute of Petroleum, located in Dehradun, Uttarakhand.
• The biojet fuel used in the demonstration flight was produced using indigenous technology developed by CSIR-IIP.
• The flight demonstrated the potential of using domestically developed biofuel technology in the aviation sector.
• According to SpiceJet’s announcement, the blended fuel had the potential to reduce the flight’s carbon footprint by approximately 15% under the stated operating conditions.

🌍 Sustainable Aviation Fuel (SAF): Further Facts

• ATF: Aviation Turbine Fuel, the conventional fuel used in jet aircraft.
• SAF: Sustainable Aviation Fuel, a broader category of aviation fuels produced through approved sustainable pathways.
• SAF can help reduce lifecycle greenhouse-gas emissions compared with conventional fossil-based jet fuel, depending on its feedstock and production process.
• SAF is not necessarily identical to biodiesel used in road vehicles; aviation fuel must satisfy specific quality and safety requirements.
• In January 2019, the Bureau of Indian Standards issued an Indian Standard relating to biojet ATF.
• India has subsequently taken steps to promote the development and use of sustainable aviation fuels, including research, production facilities and blending targets.

🧠 Important Distinction for Exams

SpiceJet’s August 2018 flight was India’s first biofuel-powered demonstration flight by an Indian airline. It should not be confused with the first commercial domestic flight using a small percentage of blended Sustainable Aviation Fuel, which was operated by AirAsia India in May 2023 on the Pune–Delhi route.

Quick Revision: First Indian airline biojet demonstration flight → SpiceJet → 27 August 2018 → Dehradun–Delhi → Bombardier Q400 → 75% ATF + 25% biojet fuel.

✔️ Final Answer: (D) SpiceJet

💧 Atal Bhujal Yojana (Atal Jal)

In June 2018, the Government of India announced that the World Bank had approved the ₹6,000 crore Atal Bhujal Yojana (Atal Jal) for sustainable groundwater management. The scheme was designed to improve groundwater management through community participation, demand-side interventions and better water-use practices. Its funding pattern was 50:50 between the Government of India and the World Bank.

📊 Important Features of Atal Bhujal Yojana

Important clarification: The ₹6,000 crore figure refers to the total scheme outlay, with equal contributions from the Government of India and the World Bank. Therefore, the World Bank’s share was ₹3,000 crore equivalent, not the entire ₹6,000 crore. The original 2018 PIB announcement described the World Bank’s approval in terms of the ₹6,000 crore scheme.

🗺️ States Covered under the Scheme

The original programme identified priority groundwater-stressed areas in seven states:

• Gujarat
• Haryana
• Karnataka
• Madhya Pradesh
• Maharashtra
• Rajasthan
• Uttar Pradesh

🎯 Main Objectives

• Improve groundwater management: Promote sustainable use of groundwater resources in water-stressed areas.
• Community participation: Involve Gram Panchayats and local communities in planning and managing groundwater resources.
• Water budgeting: Assess groundwater availability and plan water use according to local conditions.
• Demand-side management: Encourage efficient irrigation practices and reduce unnecessary groundwater extraction.
• Behavioural change: Promote awareness and collective responsibility for groundwater conservation.
• Institutional strengthening: Improve local institutions and the capacity of communities to manage water resources.

💡 Important Water-Related Terms

🧠 Extra Exam-Oriented Facts

• The scheme is named after former Prime Minister Atal Bihari Vajpayee.
• Atal Jal is the commonly used short name of Atal Bhujal Yojana.
• It focuses on groundwater conservation rather than merely increasing the supply of groundwater.
• Community participation is central to the programme because local water users play an important role in managing groundwater demand.
• Groundwater is particularly important for irrigation and rural drinking-water supply in India.
• The Central Ground Water Board (CGWB) is an important national organisation involved in groundwater assessment, monitoring and management.

Quick Revision: Atal Bhujal Yojana → ₹6,000 crore total outlay → 50:50 funding pattern → World Bank + Government of India → seven states → sustainable groundwater management.

✔️ Final Answer: (B) ₹6,000 crore

🏺 Decline of the Indus Valley Civilization and Climate Change

According to a study led by researchers from IIT Kharagpur, a prolonged drought-like phase lasting approximately 900 years contributed to the decline of the Indus Valley Civilization. The study, reported in April 2018, associated the weakening of the Indian summer monsoon with prolonged water scarcity, which affected the settlements and contributed to population migration towards regions with more favourable water availability.

🌧️ How Did Reduced Rainfall Affect the Civilization?

• Weakening of the monsoon: A prolonged weakening of monsoon rainfall reduced the availability of freshwater in several parts of the northwestern Indian subcontinent.
• Water scarcity: Reduced rainfall affected rivers, agricultural activities and the availability of water for settlements.
• Agricultural stress: Dependence on seasonal rainfall and river systems made farming communities vulnerable to prolonged climatic changes.
• Migration: Water scarcity encouraged people to move towards regions with more reliable water resources, including areas towards the Ganga–Yamuna plains.
• Urban decline: Changes in water availability and economic conditions contributed to the gradual decline of several large urban centres.

🔬 Scientific Explanation of the Study

The IIT Kharagpur research examined long-term monsoon variability using climatic evidence, including information from Tso Moriri Lake in Ladakh. The study suggested that changes in large-scale atmospheric circulation, including the influence of El Niño conditions and the southward movement of the Inter-Tropical Convergence Zone (ITCZ), weakened monsoon activity. This contributed to a prolonged drought-like phase and reduced water availability in the region.

📊 Important Facts about the Indus Valley Civilization

🌍 Other Explanations for the Decline

The decline of the Indus Valley Civilization is not generally explained by a single universally accepted cause. Researchers have discussed several interacting factors:

• Climate change: Weakening monsoon and changing rainfall patterns.
• River changes: Changes in river courses and the drying or weakening of some river systems.
• Floods: Repeated flooding may have affected certain settlements.
• Ecological pressure: Environmental changes and pressure on local resources.
• Economic changes: Changes in trade networks and the organisation of urban centres.
• Migration: Gradual movement of populations towards other regions.

🧠 Important Historical and Geographical Facts

• John Marshall played an important role in announcing the discovery of the Indus Valley Civilization in 1924.
• The civilization was known for its well-planned cities, covered drainage systems and standardized weights and measures.
• Kalibangan is associated with evidence of a ploughed field and fire altars.
• Dholavira is known for its water-management system and large reservoirs.
• Rakhigarhi, in Haryana, is one of the major Harappan sites in India.
• The civilization had trade connections with regions of Mesopotamia.

Quick Revision: IIT Kharagpur study → prolonged drought-like phase → approximately 900 years → weakening monsoon and water scarcity → migration and gradual decline of the Indus Valley Civilization.

✔️ Final Answer: (D) 900 years

🌳 India State of Forest Report (ISFR), 2017

The India State of Forest Report (ISFR) 2017 was released on 12 February 2018 by the Ministry of Environment, Forest and Climate Change. According to the report, India’s combined forest and tree cover was 24.39% of its geographical area, commonly rounded to 24.4%. Therefore, the expected answer in this question is option (D).

Important clarification: The report made a distinction between forest cover and tree cover. Strictly defined forest cover alone was 21.54%, whereas tree cover outside recorded forest areas was 2.85%. Their combined figure was 24.39%. Thus, the question’s wording is not technically precise if “forests” is interpreted as forest cover alone; the given options indicate that it intends the combined forest and tree cover figure.

📊 Forest and Tree Cover in India — ISFR 2017

🌲 What Is the Difference Between Forest Cover and Tree Cover?

Forest Cover: In the Forest Survey of India’s assessment, forest cover refers to all land patches of one hectare or more with tree canopy density of 10% or above, irrespective of ownership, legal status or land use.

Tree Cover: Tree cover generally refers to tree patches outside the mapped forest cover, including smaller patches and scattered trees. It is assessed separately from forest cover.

Combined Forest and Tree Cover: It is the sum of forest cover and tree cover. This is the figure that reached 24.39% in ISFR 2017.

🌿 Classification of Forest Cover by Canopy Density

📈 Important Findings of ISFR 2017

• Total forest and tree cover: 8,02,088 sq. km, or 24.39% of India’s geographical area.
• Forest cover: 7,08,273 sq. km, or 21.54% of geographical area.
• Tree cover: 93,815 sq. km, or 2.85% of geographical area.
• Increase in forest cover: 6,778 sq. km compared with the 2015 assessment.
• Increase in tree cover: 1,243 sq. km compared with the 2015 assessment.
• Total increase in forest and tree cover: 8,021 sq. km.
• Mangrove cover: 4,921 sq. km, included within the forest-cover assessment.
• Carbon stock: The report estimated India’s forest carbon stock at approximately 7,083 million tonnes.

🏛️ Important Institutions and Reports

• Forest Survey of India (FSI): An organisation under the Ministry of Environment, Forest and Climate Change, responsible for assessing and monitoring forest resources in India.
• Headquarters of FSI: Dehradun, Uttarakhand.
• Frequency: India State of Forest Report is published biennially, generally every two years.
• First assessment: The series of forest-cover assessments began in 1987.
• ISFR 2017: The 15th assessment in the series.
• Global context: Forest area and forest cover are different statistical concepts; international comparisons should consider the definitions used by the reporting agencies.

🌏 Updated Context — Do Not Confuse Old and New Reports

The figure of 24.39% belongs to the 2017 assessment and is the historical figure relevant to this February 2018 question. Later India State of Forest Reports have reported different figures. For example, ISFR 2019 reported combined forest and tree cover of 24.56%. Always identify the report year when answering examination questions about forest-cover percentages.

🧠 Exam-Oriented Quick Comparison

Quick Revision: ISFR 2017 → Released on 12 February 2018 → Forest cover: 21.54% → Tree cover: 2.85% → Combined forest and tree cover: 24.39% ≈ 24.4%.

✔️ Final Answer: (D) 24.40% — Combined Forest and Tree Cover

🌳 Sikkim’s Tree Relationship and Conservation Initiative

The correct answer is Sikkim. The Government of Sikkim institutionalised a traditional practice of establishing a relationship between a person and a tree through the Sikkim Forest Trees (Amity and Reverence) Rules, 2017. The initiative received attention in January 2018 for encouraging people to develop an emotional and familial bond with trees. Under this practice, a person can regard a tree as a brother or sister, thereby promoting affection, respect and responsibility towards nature.

🌿 Mith, Mit and Mitini Relationships

The traditional relationship is locally known as Mith/Mit or Mitini. A Mith/Mit relationship generally represents a brotherly bond with a tree, while Mitini represents a sisterly relationship. The objective is to connect cultural values with environmental conservation and encourage individuals to protect trees as members of their own families.

📊 Three Ways of Associating with Trees under the Rules

⚖️ Important Provisions of the Sikkim Forest Trees Rules, 2017

• Legal framework: The rules provide a formal mechanism for associating people with trees on private, public or community land, subject to the prescribed permissions and conditions.
• Registration: An interested person has to apply to the Assistant Conservator of Forests. The Forest Department verifies the proposed tree and registers the relationship.
• Protection: A tree registered under these rules cannot ordinarily be felled or damaged without government approval.
• Conservation approach: The initiative combines traditional cultural practices with community participation in environmental protection.
• Ecological importance: Trees help maintain biodiversity, absorb carbon dioxide, release oxygen, protect soil and support the water cycle.

🌏 Other Important Environmental Movements in India

🧠 Further Exam-Oriented Facts

• Sikkim: Capital – Gangtok; statehood – 16 May 1975; it became the 22nd state of the Indian Union.
• Khangchendzonga National Park: Located in Sikkim, it was inscribed on the UNESCO World Heritage List in 2016 as India’s first mixed World Heritage Site.
• Forest conservation: The Forest (Conservation) Act, 1980 was enacted to regulate the diversion of forest land for non-forest purposes. It is now known as the Van (Sanrakshan Evam Samvardhan) Adhiniyam, 1980.
• Constitutional provision: Article 48A directs the State to protect and improve the environment and safeguard forests and wildlife.
• Fundamental duty: Article 51A(g) makes it a duty of every citizen to protect and improve the natural environment, including forests, lakes, rivers and wildlife.

Quick Revision: Sikkim → Sikkim Forest Trees (Amity and Reverence) Rules, 2017 → Mith/Mit/Mitini → brother-sister relationship with trees → Adopted Tree and Smriti Tree.

✔️ Final Answer: (B) Sikkim

🧹 Swachh Survekshan Grameen (SSG), 2018

Satara district of Maharashtra achieved the first position as the best district in the national Swachh Survekshan Grameen (SSG), 2018, according to the award announcement made by the Government of India in October 2018. The survey was commissioned by the then Ministry of Drinking Water and Sanitation to assess rural sanitation and cleanliness across districts of India.

🏆 Important Awards of Swachh Survekshan Grameen, 2018

Important clarification: Satara was recognised as the best district in the overall award announcement. The detailed survey report also contained separate rankings for individual components such as citizen feedback and direct observation. Therefore, rankings in a particular component should not be confused with the overall best-district award.

📊 What Was Swachh Survekshan Grameen?

Swachh Survekshan Grameen was a nationwide assessment intended to measure the progress of rural sanitation and cleanliness. It used quantitative and qualitative indicators to evaluate sanitation conditions, public participation and cleanliness-related practices in rural areas.

🔍 Major Assessment Components

• Direct observation: Assessment of visible cleanliness and sanitation conditions in villages and public places.
• Citizen feedback: Collection of public opinions regarding cleanliness and sanitation services.
• Service-level progress: Assessment of sanitation-related arrangements and implementation of cleanliness activities.
• Community participation: Encouraging villagers and local institutions to take responsibility for maintaining sanitation.

🚽 Swachh Bharat Mission (Gramin)

The Swachh Bharat Mission was launched on 2 October 2014 to accelerate efforts towards a clean India. Its rural component, Swachh Bharat Mission (Gramin), focused on ending open defecation, promoting toilet construction and improving rural sanitation behaviour.

🧠 Further Exam-Oriented Facts

• Ministry in 2018: The survey was commissioned by the then Ministry of Drinking Water and Sanitation. The Department of Drinking Water and Sanitation now functions under the Ministry of Jal Shakti.
• Swachh Bharat Mission: It was launched on Mahatma Gandhi’s birth anniversary, 2 October 2014.
• Gandhi’s 150th birth anniversary: The original national target was to achieve a clean India by 2 October 2019.
• Rural sanitation: Gram Panchayats, local bodies and communities play important roles in maintaining sanitation and waste-management systems.
• SDG connection: Rural sanitation contributes directly to Sustainable Development Goal 6, which aims to ensure availability and sustainable management of water and sanitation for all.
• Current relevance: SBM-G Phase II gives importance to ODF sustainability and solid and liquid waste management, making rural cleanliness a continuing development priority.

Quick Revision: SSG 2018 → Best District: Satara (Maharashtra); Best State: Haryana; Maximum Citizen Participation: Uttar Pradesh; Survey commissioned by the Ministry of Drinking Water and Sanitation.

✔️ Final Answer: (C) Satara-Maharashtra

🏥 Ayushman Bharat – Pradhan Mantri Jan Arogya Yojana (AB-PMJAY)

The correct answer is Pradhan Mantri Jan Arogya Yojana (PM-JAY), which was launched by Prime Minister Narendra Modi on 23 September 2018 at Ranchi, Jharkhand. It is a major component of the Ayushman Bharat programme and was introduced to provide financial protection against hospitalisation expenses to poor and vulnerable families. At the time of its launch, it was described as the world’s largest government-funded healthcare programme.

💰 Major Features of PM-JAY at Its Launch

• Annual health cover: Up to ₹5 lakh per eligible family per year for secondary and tertiary care hospitalisation.
• Target beneficiaries: Initially, more than 10.74 crore vulnerable and deprived families, representing approximately 50 crore people, were identified for coverage.
• Cashless treatment: Eligible beneficiaries can receive cashless and paperless treatment at empanelled public and private hospitals.
• Family floater basis: The cover is available on a family-floater basis, subject to scheme rules, without a fixed limit on the number of family members.
• Portability: Eligible beneficiaries can access treatment at empanelled hospitals across India, subject to scheme provisions.
• Funding: The scheme is fully government-funded, with expenditure shared between the Centre and States according to the applicable funding pattern.

📊 Important Facts about Ayushman Bharat

🏥 Two Major Components of Ayushman Bharat

Ayushman Bharat was designed as a comprehensive approach to healthcare, combining primary healthcare services with financial protection for hospitalisation.

🧠 Important Distinctions from Other Government Schemes

• PM-JAY: Provides health assurance and hospitalisation cover to eligible beneficiaries.
• Pradhan Mantri Fasal Bima Yojana (PMFBY): Provides crop insurance to farmers against specified natural risks and crop losses.
• Pradhan Mantri Jan Dhan Yojana (PMJDY): Promotes financial inclusion through access to basic banking services.
• National Health Mission (NHM): Supports accessible, affordable and quality healthcare, with a focus on strengthening public health systems.
• Rashtriya Swasthya Bima Yojana (RSBY): An earlier health insurance scheme launched in 2008; eligible beneficiary coverage under PM-JAY also includes families carried forward from RSBY under applicable provisions.

📌 Important Recent Developments

• Expansion for senior citizens: In October 2024, the Union Government approved health coverage under AB-PMJAY for all senior citizens aged 70 years and above, irrespective of income, subject to the scheme’s conditions.
• Ayushman Vay Vandana Card: Eligible senior citizens aged 70 years and above can obtain the special card for accessing the expanded benefits.
• Digital health ecosystem: Ayushman Bharat Digital Mission (ABDM) is a separate but related initiative that aims to develop an integrated digital health infrastructure.
• Important distinction: PM-JAY is a health assurance scheme; it should not be confused with a general life insurance scheme or crop insurance programme.

Quick Revision: PM-JAY → Launched on 23 September 2018 → Ranchi, Jharkhand → ₹5 lakh per eligible family per year at launch → World’s largest government-funded healthcare programme at launch → National Health Authority.

✔️ Final Answer: (A) Pradhan Mantri Jan Aarogya Yojana

🚆 India’s First Railway University — National Rail and Transportation Institute

The expected answer is (A) Indian National Rail Academy, Vadodara. India’s first railway and transportation university was the National Rail and Transportation Institute (NRTI), established at Vadodara, Gujarat. Its first academic session began on 5 September 2018, with undergraduate programmes in transportation technology and transportation management. The institute initially operated from the premises of the National Academy of Indian Railways at Vadodara.

Important name clarification: The university itself was named the National Rail and Transportation Institute (NRTI). The Indian National Rail Academy (formerly National Academy of Indian Railways) was its initial location. Therefore, option (A) is the expected examination answer based on the location, but the formal name of the university was NRTI.

🎓 Important Facts about NRTI

• Location: Vadodara, Gujarat.
• First academic session: Began on 5 September 2018.
• First batch: 103 students from 20 states joined the initial programmes.
• Initial courses: B.Sc. in Transportation Technology and BBA in Transportation Management.
• Purpose: To develop trained professionals in railway operations, transportation technology, infrastructure, logistics and management.
• Institutional status: It was established as a Deemed-to-be University under the de novo category in 2018.

📊 First Programmes at NRTI

🏛️ Later Development: Gati Shakti Vishwavidyalaya

The National Rail and Transportation Institute was subsequently transformed into Gati Shakti Vishwavidyalaya (GSV) through the Central Universities (Amendment) Act, 2022. It is a Central University sponsored by the Ministry of Railways and has a broader mandate covering the transportation and logistics sectors, rather than railways alone.

📍 Important Railway Institutions and Their Locations

🧠 Further Exam-Oriented Facts

• Indian Railways: It is operated by the Ministry of Railways, Government of India.
• Railway Board: The Railway Board is the apex administrative and policy-making body of Indian Railways.
• Gati Shakti Vishwavidyalaya: Its expanded academic focus includes railways, roads, ports, aviation, shipping, logistics and other transportation-related sectors.
• Vadodara: It is an important city in Gujarat and is located on the banks of the Vishwamitri River.
• Exam distinction: NRTI was the original university name in 2018; Gati Shakti Vishwavidyalaya is its later name following the 2022 legislative change.

Quick Revision: First Railway University → NRTI → Vadodara, Gujarat → First academic session: 5 September 2018 → Initial location: National Academy of Indian Railways → Later renamed Gati Shakti Vishwavidyalaya in 2022.

✔️ Final Answer: (A) Indian National Rail Academy-Vadodara

⚓ JIMEX — Japan-India Maritime Exercise

JIMEX stands for Japan-India Maritime Exercise. It is a bilateral maritime exercise conducted between the Indian Navy and the Japan Maritime Self-Defense Force (JMSDF). The exercise aims to improve interoperability, strengthen mutual understanding and enhance cooperation between the two navies in maintaining maritime security.

🌊 JIMEX 2018: Important Details

The third edition of JIMEX, known as JIMEX 18, was conducted from 7 to 15 October 2018 off Visakhapatnam, Andhra Pradesh. Japanese Maritime Self-Defense Force ships arrived at Visakhapatnam on 7 October 2018. The exercise was held after a gap of five years since the previous edition in December 2013.

• Participating countries: India and Japan.
• Participating forces: Indian Navy and Japan Maritime Self-Defense Force.
• Location: Off Visakhapatnam, Andhra Pradesh.
• Dates: 7–15 October 2018.
• Edition: Third edition of JIMEX.
• Main objective: Improve interoperability, operational coordination and mutual understanding between the two navies.

🚢 Important Ships and Assets in JIMEX 18

⚓ Major Activities during the Exercise

• Anti-Submarine Warfare (ASW): Exercises to improve the ability to detect, track and respond to underwater threats.
• VBSS drills: Visit, Board, Search and Seizure procedures used in maritime security operations.
• Gun firings: Training to improve coordination and operational proficiency in naval weapons handling.
• Cross-deck helicopter operations: Operations involving helicopters operating from the ships of the participating navies.
• Harbour Phase: Included professional interactions, sports activities and planning for the sea phase.
• Sea Phase: Included coordinated maritime operations and exercises involving anti-submarine and anti-air threats.

🌏 Other Important India-Japan Military Exercises

🧠 Further Exam-Oriented Facts

• JMSDF: Japan Maritime Self-Defense Force is Japan’s maritime defence force.
• Visakhapatnam: It is an important port city on the eastern coast of India in Andhra Pradesh and is the headquarters of the Indian Navy’s Eastern Naval Command.
• Malabar Exercise: It is a multilateral naval exercise involving India, the United States, Japan and Australia.
• Indo-Pacific: Maritime cooperation between India and Japan is important for maintaining a free, open, inclusive and rules-based Indo-Pacific region.
• Interoperability: It refers to the ability of armed forces of different countries to operate together effectively through coordination, communication and compatible procedures.
• Important distinction: JIMEX is a naval/maritime exercise, whereas DHARMA GUARDIAN is an army exercise and VEER GUARDIAN is an air exercise.

Quick Revision: JIMEX → Japan-India Maritime Exercise → Indian Navy + JMSDF → JIMEX 18 → 7–15 October 2018 → Visakhapatnam → Third edition.

✔️ Final Answer: (B) Japan-India Maritime Exercise

🌫️ WAYU: Wind Augmentation and purifYing Unit

The air-pollution control system referred to in this question was WAYU (Wind Augmentation and purifYing Unit). In September 2018, the system was installed at traffic intersections in Delhi, including ITO Intersection and Mukarba Chowk. However, the Commission deleted this question itself; therefore, it should be treated as a deleted question, not as an evaluated question. Delhi is the historical factual answer, but no option should be counted as the official scored answer.

🔬 What Is WAYU?

WAYU is an air-purification device developed through collaboration between the National Environmental Engineering Research Institute (CSIR-NEERI) and the Department of Science and Technology (DST), Government of India. It was designed to improve air quality at locations such as busy road intersections, where vehicle emissions contribute significantly to local air pollution.

The system uses air movement and purification technology to help reduce certain air pollutants. Its targeted pollutants include particulate matter such as PM10 and PM2.5, carbon monoxide (CO), volatile organic compounds (VOCs) and hydrocarbons.

📊 Important Facts about WAYU

🌍 Further Exam-Oriented Environmental Facts

• PM2.5: Fine particulate matter with an aerodynamic diameter of 2.5 micrometres or less. It can penetrate deep into the respiratory system.
• PM10: Particulate matter with an aerodynamic diameter of 10 micrometres or less.
• CSIR: Council of Scientific and Industrial Research, a major Indian research and development organisation.
• NEERI: National Environmental Engineering Research Institute, headquartered in Nagpur, Maharashtra.
• DST: Department of Science and Technology, under the Ministry of Science and Technology.
• NCAP: National Clean Air Programme, launched in January 2019 to improve air quality through city-based action plans.
• Important distinction: WAYU is a local air-purification intervention; it is not a substitute for controlling pollution at its sources, such as vehicles, industries and construction activities.

Quick Revision: WAYU → Wind Augmentation and purifYing Unit; CSIR-NEERI + DST; Delhi → ITO and Mukarba Chowk; inauguration → 25 September 2018. Commission status → Deleted question.

✔️ Historical Factual Answer: (C) Delhi

Official examination status: Deleted by the Commission; not evaluated.

🏛️ Vikas Samiksha Yatra, Bihar (2017–18)

The correct answer is (D) Vikas Samiksha Yatra. On 6 January 2018, Bihar Chief Minister Nitish Kumar visited Khagaria and Begusarai districts as part of the Vikas Samiksha Yatra. During this visit, he inaugurated projects and laid foundation stones for more than 750 development schemes with a combined estimated value of over ₹500 crore.

According to the reported figures, 294 projects worth approximately ₹236 crore were inaugurated or initiated at Gauchhari-Kataha village in Khagaria, while another 462 projects worth approximately ₹321 crore were taken up at Barbigghi village in Begusarai. Together, these amounted to 756 projects.

📊 Major Details of the 6 January 2018 Visit

🎯 Objectives of Vikas Samiksha Yatra

• Review of development works: To inspect the progress and implementation of government development programmes at the district and local levels.
• Direct public interaction: To interact with people and understand their difficulties and expectations regarding government services.
• Infrastructure development: To review and promote projects relating to roads, education, health, drinking water and other public facilities.
• Social reform: The Chief Minister also highlighted campaigns against social evils such as dowry and child marriage.
• Women and youth empowerment: The programme also provided an opportunity to discuss government measures concerning women’s empowerment, education and employment opportunities for young people.

📚 Important Bihar General Knowledge

• Chief Minister of Bihar in January 2018: Nitish Kumar.
• Deputy Chief Minister in 2018: Sushil Kumar Modi.
• Capital of Bihar: Patna.
• Bihar Day: 22 March, commemorating the separation of Bihar from the Bengal Presidency in 1912.
• Important distinction: Vikas Samiksha Yatra was a development-review programme involving inspection and assessment of government schemes; it should not be confused with Vikas Yatra or Vikas Survekshan Yatra.

Quick Revision: 6 January 2018 → Nitish Kumar → Vikas Samiksha Yatra → Khagaria + Begusarai → 294 + 462 = 756 projects → estimated value above ₹500 crore.

✔️ Final Answer: (D) Vikas Samiksha Yatra

🚀 Bihar’s First Start-up Hub — Patna

The correct answer is (C) Patna. On 16 March 2018, Bihar’s Deputy Chief Minister and Information Technology Minister Sushil Kumar Modi inaugurated the state’s first Start-up Hub in Patna. The initiative aimed to encourage entrepreneurship and provide infrastructure and support to young people interested in establishing start-up businesses in Bihar.

The hub was planned as a common facility centre with workstations and office space offering free-of-cost plug-and-play facilities for approximately 31 start-up companies. Such facilities help new entrepreneurs begin operations without having to independently arrange all basic office infrastructure.

🏢 Key Features of Bihar’s First Start-up Hub

💡 What Is a Start-up?

A start-up is a newly established business, generally created to develop an innovative product, service or business model. Start-ups often focus on solving practical problems through technology, innovation and scalable business ideas. They may operate in sectors such as agriculture, healthcare, education, financial technology, e-commerce and information technology.

📚 Important Related Facts

• Startup India: The Government of India’s flagship initiative was launched on 16 January 2016 to promote entrepreneurship and innovation.
• Department for Promotion of Industry and Internal Trade (DPIIT): The department under the Ministry of Commerce and Industry responsible for administering the Startup India recognition framework.
• Plug-and-play facility: A ready-to-use workplace equipped with basic infrastructure, reducing the initial setup burden on new businesses.
• Incubator: An organisation or facility that supports early-stage start-ups through infrastructure, mentoring, networking and other assistance.
• Accelerator: A programme that helps selected start-ups grow rapidly through structured mentoring, business support and networking, usually over a fixed period.
• Bihar’s initiative: The Patna Start-up Hub was intended to create a supportive environment for young entrepreneurs and technology-based enterprises in the state.

🧠 Start-up Ecosystem: Important Terms

Quick Revision: Bihar’s first Start-up Hub → Patna; inaugurated → 16 March 2018; inaugurated by → Sushil Kumar Modi; proposed support → approximately 31 start-ups; facility → free plug-and-play workstations and office space.

✔️ Final Answer: (C) Patna

📚 Bihar Day 2018 and the Book ‘Neel Ke Dhabbe’

The correct answer is (A) Vice President Shri Venkaiah Naidu. On 22 March 2018, the then Vice President of India, M. Venkaiah Naidu, unveiled the book ‘Neel Ke Dhabbe’ in Patna during the celebrations of the 106th Bihar Day.

On the same occasion, he also released other books, including ‘Ek Tha Mohan’, ‘Bapu Ki Chiththi’ and ‘Champaran Ki Kahani’. The 2018 Bihar Day celebrations highlighted the centenary of the Champaran Satyagraha and social reform issues such as the elimination of dowry and child marriage.

📅 Important Details of Bihar Day 2018

🏛️ Why Is Bihar Day Celebrated on 22 March?

Bihar Day is celebrated every year on 22 March to commemorate the formation of Bihar as a separate province in 1912. During British rule, Bihar was separated from the Bengal Presidency and established as a distinct province. The day is marked by cultural programmes, exhibitions, public events and celebrations of Bihar’s history, heritage and achievements.

📖 Champaran Satyagraha: Important Historical Connection

The Champaran Satyagraha of 1917 was one of the earliest major movements led by Mahatma Gandhi in India after his return from South Africa. It was organised in the Champaran region of Bihar against the exploitative indigo cultivation system imposed on peasants.

• Year: 1917.
• Leader: Mahatma Gandhi.
• Region: Champaran, Bihar.
• Main issue: Exploitative indigo cultivation and the problems faced by peasants.
• Tinkathia system: Under this system, peasants were compelled to cultivate indigo on three-twentieths of their land.
• Importance: It became a significant example of Gandhi’s method of Satyagraha in the Indian freedom movement.

👤 Important Facts about M. Venkaiah Naidu

• 13th Vice President of India: M. Venkaiah Naidu served from 11 August 2017 to 10 August 2022.
• Earlier position: He served as Union Minister for Urban Development and other portfolios.
• Rajya Sabha: The Vice President of India is the ex-officio Chairman of the Rajya Sabha.
• Constitutional provision: Article 63 provides for the office of the Vice President of India.
• Election: The Vice President is elected by members of both Houses of Parliament through proportional representation by means of the single transferable vote and secret ballot.

Quick Revision: 106th Bihar Day → 22 March 2018 → Patna → book ‘Neel Ke Dhabbe’ → unveiled by M. Venkaiah Naidu, the then Vice President of India; Champaran Satyagraha → 1917.

✔️ Final Answer: (A) Vice President Shri Venkaiah Naidu

🚆 Madhepura Electric Locomotive Factory: 12,000 HP WAG-12

The correct answer is (D) 12,000 HP. The Madhepura Electric Locomotive Factory in Bihar manufactures the powerful WAG-12B electric freight locomotive, rated at 12,000 horsepower (HP). It is an important achievement under the Make in India initiative and a major modernisation project of Indian Railways.

The first prototype locomotive was completed in March 2018. The locomotive was designed for heavy freight operations and uses advanced IGBT-based, three-phase drive technology. Its high power and hauling capability help Indian Railways move heavier freight loads and improve the efficiency of goods transportation.

⚙️ Important Technical Features of WAG-12B

🚄 Why Is WAG-12B Important?

• High hauling capacity: The locomotive is designed to haul freight trains weighing up to approximately 6,000 tonnes under suitable operating conditions.
• Double-section design: It uses a twin-section configuration, providing high power for heavy freight operations.
• Regenerative braking: The system can convert part of the train’s kinetic energy into electrical energy during braking and feed it back into the electrical system, improving energy efficiency.
• IGBT technology: Insulated Gate Bipolar Transistors are used in modern power-electronic systems to control electrical power efficiently.
• Dedicated Freight Corridors: High-horsepower locomotives support the movement of heavy freight and are relevant to India’s freight-transport modernisation.
• Make in India: The project represents an important example of domestic manufacturing through collaboration between Indian Railways and Alstom.

📊 Important Railway Facts for Competitive Examinations

🧠 Additional Exam-Oriented Facts

• WAG-12B: India’s 12,000 HP electric freight locomotive manufactured at Madhepura, Bihar.
• First commercial operation: The locomotive made its maiden commercial run on 18 May 2020.
• Indian Railways: It is administered by the Ministry of Railways, Government of India.
• Alstom: The French multinational company partnered with Indian Railways for the Madhepura electric locomotive project.
• Sixth country: In the 2020 announcement, India was described as the sixth country to manufacture high-horsepower locomotives indigenously.
• Energy efficiency: Regenerative braking helps reduce energy consumption and supports more efficient railway operations.

Quick Revision: Madhepura, Bihar → WAG-12B → 12,000 HP (approximately 9,000 kW) → IGBT-based three-phase drive → heavy freight trains → first commercial run on 18 May 2020.

✔️ Final Answer: (D) 12000 HP

🇮🇳 Swachhagrahis National Convention, 2018

On 10 April 2018, Prime Minister Shri Narendra Modi addressed the National Convention of Swachhagrahis at Motihari, East Champaran district, Bihar. The programme marked the culmination of the week-long “Satyagraha se Swachhagraha” campaign, organised from 3 to 10 April 2018. Around 20,000 Swachhagrahis participated in the event, which connected the cleanliness movement with the legacy of Mahatma Gandhi’s Champaran Satyagraha.

🧹 What Are Swachhagrahis?

Swachhagrahis are community-level volunteers and motivators who promote sanitation and hygiene practices in villages. They help mobilise people, encourage toilet use, support behaviour change and contribute to the objectives of the Swachh Bharat Mission (SBM). Their work is based on community participation rather than merely constructing sanitation infrastructure.

📊 Important Events and Facts

📜 Champaran Satyagraha: Historical Connection

Champaran Satyagraha (1917) was Mahatma Gandhi’s first major Satyagraha movement in India. It began in the Champaran region of Bihar against the exploitation of indigo cultivators under the oppressive Tinkathia system, which compelled peasants to grow indigo on a portion of their land. The movement became an important milestone in India’s freedom struggle and established the effectiveness of non-violent resistance.

• Year: 1917.
• Leader: Mahatma Gandhi.
• Region: Champaran, Bihar.
• Main issue: Exploitation of indigo cultivators.
• Tinkathia system: Peasants were compelled to cultivate indigo on 3/20 of their land.
• Historical importance: Gandhi’s first major Satyagraha in India.

🧠 Further Exam-Oriented Facts

• Swachh Bharat Mission: Launched on 2 October 2014, on the birth anniversary of Mahatma Gandhi.
• SBM-Gramin: Focuses on rural sanitation, toilet access, behaviour change and sustainable cleanliness practices.
• SBM-Urban: Focuses on sanitation and solid-waste management in urban areas.
• Motihari: Headquarters of East Champaran district in Bihar.
• 10 April: The day Gandhi began the Champaran Satyagraha in 1917; the 2018 convention was held on its centenary anniversary.

Quick Revision: 10 April 2018 → Swachhagrahis National Convention → Motihari → Narendra Modi → Satyagraha se Swachhagraha → Champaran Satyagraha (1917).

✔️ Final Answer: (A) Motihari

🚨 CBRN Emergency Preparedness at Patna Airport

In April 2018, the National Disaster Management Authority (NDMA) conducted a specialised airport emergency preparedness programme at Lok Nayak Jayaprakash Airport (LNJP), Patna. The programme aimed to improve the ability of Airport Emergency Handlers to respond to emergencies involving CBRN materials. On 27 April 2018, the Ministry of Home Affairs reported the completion of a five-day training programme and a full-scale biological emergency exercise at Patna airport.

☢️ What Does CBRN Mean?

CBRN stands for Chemical, Biological, Radiological and Nuclear. These emergencies may arise from accidental release, industrial incidents, infectious biological agents, radioactive materials or nuclear-related threats. They require specialised detection, protection, containment, decontamination, medical response and coordination among multiple agencies.

📊 Four Components of CBRN

🏢 Important Details of the April 2018 Programme

• Venue: Lok Nayak Jayaprakash Airport, Patna.
• Organisation: National Disaster Management Authority (NDMA).
• Collaborating institutions: Airports Authority of India (AAI) and Institute of Nuclear Medicine and Allied Sciences (INMAS).
• Training duration: Five days.
• Exercise: A full-scale biological emergency management exercise.
• Scenario: A suspected Ebola outbreak was used for the biological emergency exercise.
• Participants: Airport management, health and medical services, customs, immigration, fire services, disaster management authorities and disease surveillance units.

🛡️ NDMA: Important Institutional Facts

The National Disaster Management Authority (NDMA) is India’s apex statutory body for disaster management. It was established under the Disaster Management Act, 2005, and is chaired by the Prime Minister of India. It lays down policies, plans and guidelines for disaster management and promotes preparedness, mitigation and coordinated response.

🧠 Further Exam-Oriented Facts

• Disaster Management Act: Enacted in 2005; provides the legal framework for disaster management in India.
• NDMA Chairperson: Prime Minister of India.
• NDRF: National Disaster Response Force; it provides specialised disaster-response support.
• INMAS: Institute of Nuclear Medicine and Allied Sciences, associated with defence-related biomedical and nuclear medicine research.
• Mock drill: A simulated exercise used to test preparedness, communication, coordination and response procedures.
• Important distinction: CBRN is a category of hazardous emergencies; it is not the name of a single disease or a single chemical substance.

Quick Revision: April 2018 → NDMA programme → LNJP Airport, Patna → CBRN preparedness → Chemical, Biological, Radiological and Nuclear.

✔️ Final Answer: (B) LNJP-Patna

📶 Patna Ranked First in 4G Availability

According to an OpenSignal report published in April 2018, Patna ranked first among 20 major Indian cities in terms of 4G availability. The measurement covered approximately 90 days beginning on 1 December 2017 and extending into February 2018. Patna recorded approximately 92.6% 4G availability, placing it ahead of several major metropolitan and technology centres.

📊 What Did the Report Measure?

4G availability measures the proportion of time users were connected to an LTE/4G network, rather than simply measuring the theoretical maximum internet speed. Therefore, a city may rank highly in network availability without necessarily having the highest download speed. This distinction is important for interpreting telecom rankings.

📡 4G Technology: Important Facts

4G means the fourth generation of mobile telecommunications technology. LTE, or Long-Term Evolution, is a widely used technology associated with 4G mobile broadband. It provides higher data rates, lower latency and improved network capacity compared with earlier mobile technologies such as 3G.

• 4G: Fourth-generation mobile communication technology.
• LTE: Long-Term Evolution.
• VoLTE: Voice over LTE; enables voice calls over an LTE network.
• 5G: Fifth-generation mobile communication technology, designed for enhanced mobile broadband, low latency and support for large numbers of connected devices.
• TRAI: Telecom Regulatory Authority of India, established in 1997, regulates India’s telecommunications sector.
• DoT: Department of Telecommunications, under the Ministry of Communications, Government of India.

📈 Availability Versus Speed: Do Not Confuse

🧠 Further Exam-Oriented Facts

• OpenSignal: An independent company that analyses mobile network experience and connectivity using measurements from mobile devices.
• LTE: A standard for high-speed wireless communication used in 4G networks.
• TRAI: Established on 20 February 1997 under the TRAI Act, 1997.
• Telecom regulator: TRAI regulates telecom services, while the Department of Telecommunications performs government policy and administrative functions.
• Historical context: This question refers specifically to the 2017–18 OpenSignal measurement. It should not be treated as a statement about the present-day 4G ranking of Indian cities.

Quick Revision: OpenSignal report → April 2018 → 20 Indian cities → Patna ranked First → approximately 92.6% 4G availability.

✔️ Final Answer: (A) First

💧 Sulabh Jal Project, Darbhanga

In July 2018, Sulabh International launched its low-cost drinking water project, “Sulabh Jal”, in Darbhanga, Bihar. The project was initiated at Haribol Pond, on the premises of Darbhanga Municipal Corporation. Its objective was to convert contaminated pond and river water into safe drinking water through a purification process and make it available at approximately 50 paise per litre.

📊 Important Features of Sulabh Jal

🔬 Why Was the Project Important for Bihar?

Several districts in northern Bihar have faced groundwater-quality problems, including contamination by arsenic and other chemicals. Long-term consumption of unsafe drinking water can cause serious health problems. The Sulabh Jal initiative aimed to provide an affordable source of potable water by treating locally available water from ponds and other water bodies.

• Arsenic: A naturally occurring element that can contaminate groundwater.
• Health concern: Long-term exposure to inorganic arsenic through drinking water can cause skin lesions and increase the risk of certain cancers.
• Water purification: Treatment processes are used to remove or reduce contaminants and make water suitable for drinking.
• Community participation: The project was designed to involve local residents and organisations in its operation and maintenance.
• Affordable access: The proposed price of 50 paise per litre was intended to make treated drinking water accessible at a low cost.

🏢 Sulabh International: Important Facts

Sulabh International Social Service Organisation is a social service organisation associated with sanitation, public hygiene, toilet technology and waste management. It was founded by Dr. Bindeshwar Pathak in 1970. It became widely known for promoting affordable sanitation systems and the Sulabh public toilet model.

🧠 Further Exam-Oriented Facts

• Darbhanga: A major city in north Bihar and the headquarters of Darbhanga district.
• Mithila region: Darbhanga is an important cultural centre of the Mithila region.
• Arsenic contamination: Arsenic is a chemical contaminant of concern in groundwater in parts of the Gangetic plains.
• Safe drinking water: Water must meet applicable microbiological and chemical quality standards before being considered safe for consumption.
• Jal Jeevan Mission: Launched in 2019, it aims to provide functional household tap connections to rural households.
• Important distinction: Sulabh Jal was a low-cost water purification project; it was not the same programme as the Jal Jeevan Mission.

Quick Revision: Sulabh Jal → Darbhanga → July 2018 → Haribol Pond → approximately 50 paise per litre → up to 8,000 litres per day.

✔️ Final Answer: (C) Darbhanga

👧 Mukhyamantri Kanya Utthan Yojana, Bihar

Mukhyamantri Kanya Utthan Yojana (MKUY) is a Bihar Government initiative designed to promote the welfare, education and empowerment of girls. It aims to encourage the birth and registration of girl children, improve immunisation, reduce child marriage and support girls through different stages of education. The scheme was launched in August 2018 as an integrated initiative covering the life cycle of a girl child.

The original programme design documented by UNICEF provided cumulative benefits of approximately ₹54,100 per girl through multiple conditional grants from birth to the age of 21 years. Therefore, the statement that every girl would receive a total of exactly ₹60,000 is not correct according to that original benefit structure.

📊 Important Features of the Scheme

💰 Examples of Benefits at Different Stages

The original integrated scheme combined several existing and new interventions. Financial assistance was linked to specific stages and conditions, rather than being paid as one single amount at birth.

Important: The amounts and eligibility conditions shown above refer to the original programme design and its specified stages. Benefit amounts and eligibility rules may be revised through later government notifications. The total should not be assumed to be a single unconditional payment to every girl child.

🏢 Three Departments Responsible for the Scheme

The scheme is a joint initiative of three major departments of the Bihar Government. Their responsibilities cover social protection, health and education-related interventions.

🎯 Major Objectives

• Promote the birth of girls: Encourage families to welcome and support girl children.
• Improve sex ratio: Address gender discrimination and encourage the protection of girl children.
• Birth registration: Encourage timely registration of every girl child’s birth.
• Immunisation: Promote complete vaccination and improve child health.
• Education: Provide financial incentives to support girls’ education and reduce school dropout.
• Prevent child marriage: Encourage girls to continue education and delay marriage.
• Empowerment: Promote self-reliance and improve the social and economic status of women.

🧠 Further Exam-Oriented Facts

• DBT: Direct Benefit Transfer is a mechanism through which eligible benefits are transferred directly to beneficiaries’ bank accounts.
• UNICEF: The United Nations Children’s Fund; it has documented the integrated design and life-cycle approach of Bihar’s Kanya Utthan programme.
• Beneficiary coverage: The original programme was designed to cover girls at different stages of life, with conditions attached to specific benefits.
• Two-child provision: Some early components and predecessor schemes had family-based limits; eligibility should be checked against the applicable component and notification rather than assumed to be identical for every benefit.
• Important distinction: The ₹2,000 birth grant is one component of the scheme, not the total amount payable from birth to graduation.
• Current status: The Bihar Government continues to list Kanya Utthan-related schemes on its official DBT and service portals. The applicable benefit amount should be checked against the latest official notification before applying.

Quick Revision: Bihar → Mukhyamantri Kanya Utthan Yojana → launched in August 2018 → three departments (Social Welfare, Health and Education) → ₹2,000 birth benefit → original cumulative design approximately ₹54,100 → statement of ₹60,000 is incorrect.

✔️ Final Answer: (C) Every girl child will receive total 60,000 from her birth to graduation level education

🏺 Mehrgarh: One of the Earliest Farming Settlements in South Asia

Mehrgarh is an important Neolithic archaeological site located in the Kachhi Plain of Balochistan, present-day Pakistan, near the Bolan Pass. It provides some of the earliest known evidence of settled agricultural life and animal domestication in the north-western part of the Indian subcontinent. The earliest occupation is generally dated to around 7000 BCE.

Archaeological evidence from Mehrgarh indicates that early communities practised agriculture, domesticated animals and gradually developed permanent settlements. The site is particularly important for understanding the transition from hunting and gathering to food production in South Asia.

🌾 Major Archaeological Evidence from Mehrgarh

📚 Important Phases of Mehrgarh

• Period I (c. 7000–5500 BCE): The earliest phase, characterised by aceramic Neolithic culture, agriculture, animal domestication and mud-brick structures. Aceramic means that pottery was not yet commonly used.
• Later phases: Pottery, specialised crafts, ornaments and more developed settlement activities became increasingly visible.
• Long-term significance: Mehrgarh helps archaeologists understand the cultural developments that preceded the mature Harappan civilisation.

🗺️ Comparison with Other Archaeological Sites

🧠 Further Exam-Oriented Facts

• Discovery and excavation: Mehrgarh was brought to archaeological attention through excavations led by French archaeologists Jean-François Jarrige and his team beginning in 1974.
• Geographical setting: It lies in the Kachhi Plain, close to the Bolan Pass, an important route connecting the Indus region with the Iranian plateau and Central Asian areas.
• Neolithic Revolution: The transition towards agriculture, animal domestication and settled life is commonly described as the Neolithic Revolution.
• Harappan connection: Mehrgarh represents an important early cultural background to the later development of the Indus or Harappan civilisation, but it should not be described as a mature Harappan city.
• Important distinction: Mehrgarh is in present-day Pakistan, but it is relevant to the archaeology of the ancient Indian subcontinent.
• Exam trap: Burzahom is famous for pit dwellings, while Mehrgarh is particularly important for early evidence of agriculture and animal domestication.

Quick Revision: Mehrgarh → Balochistan → c. 7000 BCE → early agriculture → domesticated cattle, sheep and goats → Neolithic culture.

✔️ Final Answer: (D) Mehrgarh

☸️ First Buddhist Council: Rajgriha (Rajgir)

The First Buddhist Council was traditionally held at Rajgriha (modern Rajgir, Bihar) shortly after the Mahaparinirvana of Gautama Buddha. It is traditionally dated to around 483 BCE, although the exact chronology of early Buddhist councils is debated by historians.

The council was held under the patronage of King Ajatashatru of the Haryanka dynasty. According to Buddhist tradition, the assembly was presided over by Mahakassapa (Mahakashyapa), one of the senior disciples of the Buddha. Its main objective was to preserve and systematically recite the Buddha’s teachings and the monastic disciplinary rules.

📜 Major Participants and Their Contributions

📚 The Three Pitakas: Basic Buddhist Canonical Classification

The Buddhist canonical literature is traditionally organised into three Pitakas, especially in the Theravada tradition:

Important historical caution: Traditional accounts associate the First Council with the recitation of the Vinaya and Sutta traditions. The precise historical formation and final compilation of the three Pitakas took place over a longer period; therefore, it is not accurate to assume that all three were written down at the First Council.

🏛️ Four Major Buddhist Councils: Exam Comparison

📍 Important Buddhist Places in Bihar

• Rajgir: Associated with the First Buddhist Council and important events in the life of the Buddha.
• Bodh Gaya: The place where Gautama Buddha attained enlightenment under the Bodhi tree.
• Vaishali: Associated with the Second Buddhist Council in traditional accounts; also important in the life of the Buddha.
• Nalanda: Famous for the ancient Buddhist monastic and educational centre, which developed into a major centre of learning.
• Pataliputra: Associated with the Third Buddhist Council during the reign of Ashoka.

🧠 Further Exam-Oriented Facts

• Mahaparinirvana: It refers to the final passing away of Gautama Buddha, traditionally associated with Kushinagar in present-day Uttar Pradesh.
• First Council venue: The traditional venue was Saptaparni Cave (Sattapanni Cave) near Rajgriha.
• Rajgriha: It was an important capital of Magadha before Pataliputra became the principal capital.
• Ajatashatru: He belonged to the Haryanka dynasty and was the son of Bimbisara according to traditional historical accounts.
• Exam distinction: First Council—Rajgriha; Second—Vaishali; Third—Pataliputra; Fourth—Kashmir in the traditional northern Buddhist account.

Quick Revision: First Buddhist Council → Rajgriha → Ajatashatru → Mahakassapa → Ananda (Sutta) → Upali (Vinaya).

✔️ Final Answer: (A) Rajgriha (Rajgir)

🪙 Vima Kadphises: Large-Scale Gold Coinage in Ancient India

Vima Kadphises (also written as Vima Kadphises or Wima Kadphises) was an important Kushan ruler, generally placed in the first half of the 2nd century CE. He is credited with introducing and issuing gold coins on a large scale in the Kushan Empire. His gold coinage is an important development in the monetary and economic history of ancient India.

The Kushans controlled important commercial routes linking northern India with Central Asia and regions farther west. Their expanding trade and political power supported the circulation of gold coinage. Vima Kadphises issued gold coins bearing royal titles and religious imagery, including representations of the ruler and deities.

👑 Important Features of Vima Kadphises’ Coins

• Metal: Gold coins were issued in substantial quantities; copper coinage was also used.
• Royal portrait: Many coins depict the king standing or performing a ritual, with royal clothing and symbols.
• Religious symbols: Some coins depict Shiva-like imagery and a bull, reflecting the religious iconography used by the Kushan rulers.
• Inscriptions: Greek-derived script and language were used on many Kushan coins, alongside evolving local and Iranian cultural influences.
• Economic significance: Gold coinage reflects the political authority, wealth and commercial connections of the Kushan Empire.

📊 Important Kushan Rulers and Their Contributions

🌏 Kushan Empire: Trade and Cultural Significance

The Kushan Empire occupied a strategic geographical position between the Indian subcontinent, Central Asia and the Iranian world. It benefited from long-distance trade routes, including branches of the Silk Road.

• Trade: Commercial contacts connected the Kushan territories with the Roman Empire, Central Asia and China.
• Coinage: Kushan coins were issued in gold, copper and other metals, and are important sources for reconstructing political and economic history.
• Religious diversity: Kushan coins show a wide range of religious figures and symbols, including Iranian, Greek and Indian deities.
• Gandhara and Mathura: Both regions became important centres of art and religious activity during the Kushan period.
• Buddhist art: The Kushan age is associated with the development of Gandhara and Mathura schools of art.

🧠 Comparison with Other Options

📌 Further Exam-Oriented Facts

• Menander: Also known as Milinda, he is famous for his association with the Buddhist monk Nagasena and the text Milindapanho.
• Gautamiputra Satakarni: He was a major Satavahana ruler who defeated the Western Kshatrapa ruler Nahapana according to inscriptional and numismatic evidence.
• Kanishka: He is one of the best-known Kushan rulers and is associated with the expansion of Buddhism and the development of Buddhist art.
• Numismatic evidence: Coins provide evidence about rulers, titles, trade, religious beliefs, political authority and economic conditions.
• Important distinction: Vima Kadphises is particularly associated with the large-scale issue of gold coinage; this does not mean that no gold coins existed in the Indian subcontinent before him.

Quick Revision: Vima Kadphises → Kushan dynasty → 2nd century CE → large-scale gold coinage → trade and monetary expansion.

✔️ Final Answer: (C) Vima Kadphises

🌍 Aryabhata: Earth’s Rotation and the Apparent Daily Motion of the Sun

Aryabhata (born in 476 CE) was a pioneering Indian mathematician and astronomer. In his famous work Aryabhatiya (499 CE), he explained that the apparent daily movement of the stars and the rising and setting of the Sun can be understood through the rotation of the Earth on its own axis.

He compared the apparent movement of celestial objects to the experience of a person travelling in a moving boat: objects on the riverbank appear to move in the opposite direction even though it is the boat that is moving. Similarly, the sky appears to move from east to west because the Earth rotates from west to east.

🌞 Apparent Motion of the Sun vs. Rotation of the Earth

• Actual motion: The Earth rotates around its own axis from west to east.
• Apparent motion: Due to this rotation, the Sun appears to rise in the east and set in the west.
• Rotation period: One rotation relative to distant stars takes approximately 23 hours, 56 minutes and 4 seconds. This is called a sidereal day.
• Solar day: The average time from one apparent noon to the next is approximately 24 hours.
• Direction: The Earth rotates eastward, making celestial bodies appear to move westward across the sky.

📚 Aryabhata’s Major Contributions

🌑 Aryabhata’s Explanation of Eclipses

Aryabhata explained solar and lunar eclipses using astronomical reasoning:

• Solar eclipse: It occurs when the Moon comes between the Earth and the Sun and blocks the Sun’s light from reaching part of the Earth.
• Lunar eclipse: It occurs when the Earth comes between the Sun and the Moon, causing the Earth’s shadow to fall on the Moon.
• Scientific importance: These explanations challenged supernatural or purely mythological interpretations of eclipses.

📖 Important Indian Mathematicians and Astronomers

🧠 Further Exam-Oriented Facts

• Aryabhatiya: Aryabhata composed this major work in 499 CE, when he was traditionally said to be 23 years old.
• Four sections: The work is organised into Gitikapada, Ganitapada, Kalakriyapada and Golapada.
• Golapada: This section deals with spherical astronomy and the movement of celestial bodies.
• Zero: Aryabhata used a place-value system, but the development of zero as a mathematical number involved contributions from several Indian mathematicians over time.
• Earth’s shape: Aryabhata described the Earth as spherical.
• Important distinction: Aryabhata explained the apparent daily motion of the sky through Earth’s rotation; this is different from claiming that he developed the complete modern heliocentric model.

Quick Revision: Aryabhata → 476 CE birth → Aryabhatiya (499 CE) → Earth rotates west to east → apparent rising and setting of the Sun → scientific explanation of eclipses.

✔️ Final Answer: (A) Aryabhata

🏛️ Balaputradeva and the Nalanda Monastery

Balaputradeva was a ruler of the Sailendra dynasty, associated with Suvarnabhumi in Southeast Asia. He is famous for his diplomatic and religious links with the Pala Empire of Bengal. According to the Nalanda copper-plate inscription of Devapala, Balaputradeva sent an ambassador to the Pala ruler Devapala, requesting a grant of five villages for the maintenance of a Buddhist monastery established at Nalanda for the benefit of Buddhist monks and scholars.

Devapala accepted the request and granted five villages for the monastery’s maintenance. This inscription is an important source for understanding the cultural, religious and diplomatic relations between eastern India and Southeast Asia during the early medieval period.

📜 Nalanda Copper-Plate Inscription of Devapala

• Ruler granting the villages: Devapala, a prominent Pala ruler.
• Ruler making the request: Balaputradeva of the Sailendra dynasty.
• Ambassador: The request was conveyed through Balaputradeva’s ambassador.
• Grant: Five villages were granted for the maintenance of the Buddhist monastery at Nalanda.
• Purpose: The income from the villages supported the monastery, including the needs of Buddhist monks and religious and educational activities.
• Historical value: The inscription provides evidence of international Buddhist connections and diplomatic exchanges in the Pala period.

🌏 Suvarnabhumi and the Sailendra Dynasty

Suvarnabhumi literally means the Land of Gold. It is an ancient geographical term used in Indian and Buddhist traditions for parts of Southeast Asia. Its exact geographical identification has been debated, and it should not automatically be treated as the name of one precisely defined modern country.

The Sailendra dynasty was a major political and cultural power in maritime Southeast Asia, particularly associated with Java and the wider Indonesian region. The dynasty is also connected with the development of Buddhist monuments and religious institutions.

📊 Important Pala Rulers and Their Contributions

🎓 Nalanda: An Ancient Centre of Buddhist Learning

Periplus of the Erythraean Sea is an ancient Greek-language work that describes the maritime trade routes, ports, coastal regions and commercial activities of the Red Sea, the Indian Ocean and the western coast of India.

The work is generally dated to the 1st century CE. Its author is unknown and is conventionally referred to as the Anonymous Author of the Periplus. Therefore, none of the four named historians is accepted as its author.

Important historical information:

Important personalities and their works:

• Pliny the Elder: Wrote Natural History, an encyclopaedic work.
• Ptolemy: Wrote Geography (Geographia), an important work on geographical knowledge.
• Strabo: Wrote Geographica, a major work on historical and geographical subjects.
• Ctesias: A Greek physician and historian associated with works on Persia and India.

Exam Point: The Periplus is an important source for reconstructing Indo-Roman maritime trade during the early centuries of the Common Era.

Final Answer: (E) None of the above/More than one of the above.

The earliest detailed account of Bakhtiyar Khilji’s invasion and conquest of Bihar is found in Tabaqat-i Nasiri, written by the Persian historian Minhaj-i-Siraj Juzjani in the 13th century.

Bakhtiyar Khilji was a military commander of the Ghurid expansion in eastern India. He conquered important territories in Bihar and subsequently advanced into Bengal. His campaigns played a significant role in the establishment of Turkish political authority in eastern India.

Important facts about the sources:

About Bakhtiyar Khilji:

• He was associated with the Ghurid military expansion in eastern India.
• He conquered Bihar and later established his authority in parts of Bengal.
• His campaigns are associated with the decline of older political establishments in parts of eastern India.
• Minhaj-i-Siraj provides an important historical account of his activities.

Exam Point: Remember the association: Bakhtiyar Khilji – Bihar conquest – Minhaj-i-Siraj – Tabaqat-i Nasiri.

Final Answer: (B) Tabaqat-i Nasiri.

Ala-ud-din Khilji (1296–1316 CE) introduced important land revenue reforms to strengthen the financial resources of the Delhi Sultanate. He fixed the land revenue at approximately 50% of the produce in the areas where his revenue system was implemented.

His administration undertook the measurement of agricultural land and attempted to assess revenue on the basis of cultivated land and agricultural production. The policy was particularly significant in the fertile regions of the Ganga-Yamuna Doab.

Major features of Ala-ud-din Khilji’s revenue policy:

• Land revenue was fixed at approximately half of the agricultural produce in the relevant territories.
• Agricultural land was measured for revenue assessment.
• The state attempted to strengthen direct control over revenue collection.
• Additional taxes, including grazing tax (Charai) and house tax (Ghari), were also imposed.
• The reforms helped the Sultan maintain a large standing army and finance military campaigns.

Important terms:

Why were these reforms important?

The revenue reforms were intended to increase state income, reduce the influence of powerful rural intermediaries and provide the financial resources required for maintaining a strong army. Ala-ud-din’s market-control measures and military reforms were closely connected with his wider administrative policy.

Exam Point: Ala-ud-din Khilji is associated with land measurement and the assessment of land revenue at approximately half of the produce.

Final Answer: (C) Ala-ud-din Khilji.

Shaikh Bahauddin Zakaria (c. 1170–1267 CE) was a prominent Sufi saint of the Suhrawardi Silsilah in the Indian subcontinent. He played a major role in spreading the Suhrawardi tradition in Multan and the surrounding regions.

He was associated with the Suhrawardi spiritual tradition that originated in West Asia and became influential in medieval India. His centre at Multan developed into an important centre of Sufi learning and spiritual activity.

Major Sufi orders in medieval India:

Important facts about Bahauddin Zakaria:

• He was a leading figure of the Suhrawardi Silsilah in the Indian subcontinent.
• His major centre of activity was Multan.
• He contributed to the spread of Sufi teachings in the north-western parts of the Indian subcontinent.
• He is associated with the Suhrawardi tradition rather than the Chishti order.

Exam Point: Bahauddin Zakaria – Suhrawardi Silsilah – Multan. This association is important for medieval Indian history questions.

Final Answer: (A) Suhrawardi Silsilah.

Official Answer: Option (E). The supplied official answer key identifies option E as the correct response for this question.

The question concerns the organisation of military forces under the Afghan rulers of the Delhi Sultanate and the Sur dynasty. The listed rulers belong to different phases of medieval Indian history, and their military and administrative arrangements should be studied separately.

Historical background of the rulers:

Important administrative contributions of Sher Shah Suri:

• He strengthened the central administration and improved the organisation of the army.
• He introduced important reforms in land revenue assessment.
• He improved roads and communication, including the development of the Grand Trunk Road.
• He reorganised the currency system and issued a silver coin known as the Rupiya.

Important clarification: The official answer supplied for this particular question is E. The exact military-unit classification mentioned in the question should not be attributed to a particular ruler solely on the basis of this answer key. A specific primary or standard historical reference would be needed to establish whether the intended interpretation is “none of the above” or “more than one of the above.”

Exam Point: Remember the distinction between the Lodi dynasty (1451–1526 CE) and the Sur dynasty (1540–1555 CE). Sher Shah Suri and Islam Shah Suri belonged to the Sur dynasty.

Final Answer: (E) None of the above/More than one of the above — as per the official answer key.