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The correct answer is option 2.

Key Points

• Badruddin Tyabji was the first Muslim President of the Indian National Congress. Hence option 2 is correct.
• He served as the President during the 3^rd session of the INC in 1887, held in Madras (now Chennai).
• Tyabji's election as President symbolized the secular and inclusive nature of the Congress during its early years.

Additional Information

• Hasrat Mohani: A prominent freedom fighter and poet, but he never served as President of the INC.
• Maulana Azad: Served as Congress President later (1940–1946)

The correct answer is option 1. 

Key Points

• The Government of India Act of 1919 converted the unicameral legislature of Bihar into a bicameral legislature. This act also introduced a bicameral legislature at the central level in India. Hence option 1 is correct.

Additional Information

• The Government of India Act of 1919, also known as the Montague-Chelmsford reforms, introduced a bicameral legislature at the central level in India.
• The act also gave women the right to vote in India.
• The Government of India Act of 1935 introduced provincial autonomy in the provinces.
• The act also laid the foundation of democracy in India.
• The Bihar Legislative Assembly is the lower house, while the Bihar Legislative Council is the upper house.

BPSC deleted this question

Key Points

• River Subarnarekha originates at latitude 23°18' N and crosses Tropic of Cancer twice.
• River N.Koel and S. Koel Originates at 23°04' N and 22°15' N. North Koel crosses it once and S.Koel never crosses this line.
• River Damodar crosses tropic of cancer only once in West Bengal.
• None of the given options is correct.

Additional Information

• North Koel River:
• Originates from the Ranchi Plateau near Palamu, Jharkhand.
• Flows through the Chhota Nagpur Plateau and joins the Son River, a tributary of the Ganges.
• Plays a critical role in irrigation and water supply in Jharkhand and Bihar.
• The Mandal Dam Project is located on this river for irrigation and power generation.
• Suwarnarekha River:
• Originates near Piska, west of Ranchi, in Jharkhand.
• Flows through Jharkhand, West Bengal, and Odisha, draining into the Bay of Bengal.
• Supports irrigation, fishing, and industrial water supply.
• Known for its economic importance due to industrial centers along its course, such as Jamshedpur (Tata Steel Plant).

The correct answer is option 1. 

Key Points In 2019-20, the Service Sector contributed 60.2% to Bihar's Gross State Domestic Product (GSDP). Hence option 1 is the correct answer. 

Additional InformationService Sector:

• The service sector has become the largest contributor to Bihar's GSDP, accounting for 60.2% in 2019-20.
• It includes industries such as education, healthcare, trade, transportation, real estate, IT services, and financial services.
• The sector has been a significant source of employment, especially in urban areas.
• Increased urbanization has driven demand for services like banking, education, and healthcare.
• Although agriculture remains critical, it contributes around 20-25% of GSDP and is less than services due to its dependence on monsoons and low productivity.
• The industrial sector, including manufacturing and construction, has a smaller share (15-20%) due to limited industrialization in the state.

The Correct answer is Option 1. 

Key Points

• A tree’s trunk grows primarily from the tips (apical meristems) rather than pushing older wood upward. Although the trunk thickens (increases in girth) over time due to lateral growth, any fixed point along its length does not shift significantly up or down.
• Therefore, a nail driven into the trunk at 1 m above the ground will still be at roughly the same height two years later, even though it may become more embedded as the trunk thickens. Hence Correct answer is Option 1.

The Correct answer is Option 4. 

Key Points

Identify each region:

• Triangle represents Men.
• Rectangle represents Businessmen.
• Circle represents Millionaires.

Locate the common region:

The question asks for the set of individuals who are Men (triangle) and Businessmen (rectangle) and Millionaires (circle).

By examining the diagram, the only region that lies within all three shapes is labeled with the number 10.

Hence, the number representing people who are Men, Businessmen, and Millionaires is 10.

Hence Option 3 is correct.

The correct answer is option 1.

Key Points

• Muzaffarpur district recorded the highest maize production in Bihar. Hence, option 1 is correct.

The correct answer is option 3.

Key PointsK. R. Narayanan served as:

• The 10^th President of India (1997–2002).
• Ambassador to the USA, China, Turkey, and Thailand during his diplomatic career.
• Vice-Chancellor of Jawaharlal Nehru University (JNU) before entering politics. Hence the option 3 is the correct answer.

Additional Information

• Dr. S. Radhakrishnan served as the 2^nd President of India and was a renowned philosopher.
• Dr. Shankar Dayal Sharma served as the 9^th President of India.
• R. Venkataraman served as the 8^th President of India and had a political career, but he was not associated with ambassadorships or JNU.

The correct answer is option 3.

Key Points

• The dark reaction of photosynthesis (also called the Calvin Cycle) occurs in the stroma of the chloroplast. Hence option 3 is the correct answer.
• The stroma is the fluid-filled region surrounding the grana, where enzymes involved in the Calvin Cycle fix carbon dioxide into glucose using ATP and NADPH generated in the light reaction.

Additional Information

• Granum:
• Grana (plural of granum) are stacks of thylakoids where the light reaction of photosynthesis occurs, not the dark reaction.
• Grana Lamella:
• Involved in electron transport and linking grana stacks, but not the site of the dark reaction.

The correct answer is the option 3.

Key Points

• The hydrogenation of vegetable oil into vanaspati ghee involves the addition of hydrogen to unsaturated fats to convert them into saturated fats.
• Nickel (Ni) is used as a catalyst in this process because it facilitates the reaction by lowering the activation energy and speeding up the hydrogenation. Hence option 3 is the correct answer.

Additional Information

• Pd (Palladium):
• Palladium is used in selective hydrogenation and other specific chemical reactions but is not commonly used in the industrial hydrogenation of vegetable oils.
• Fe (Iron):
• Iron is not used as a catalyst in hydrogenation processes.