251. Ornithology is the

A. study of smells
B. study of birds
C. study of bones
D. None of the above
✅ The correct answer is option B.
Ornithology is the study of birds. An ornithologist is someone who studies ornithology the branch of science devoted to birds. Ornithologists study every aspect of birds, including bird songs, flight patterns, physical appearance, and migration patterns.

252. India’s first indigenously built submarine was

A. INS Delhi
B. INS Vibhuti
C. INS Shalki
D. INS Savitri
✅ The correct answer is option C.
INS Shalki (S46) is a Shishumar-class diesel-electric submarine of the Indian Navy. The submarine was the first ever submarine to be built in India. It was launched in 1987 by the late Prime Minister Rajiv Gandhi.

254. Vijayalakshmi Pandit was

A. the first women minister of an Indian state (UP)
B. the first women to become president of the UN General Assembly
C. the first Indian women Ambassador to Moscow
D. All of the above
✅ The correct answer is option D.
Vijayalakshmi Pandit was the first women minister of an Indian state (UP), the first women to become president of the UN General Assembly and the first Indian women Ambassador to Moscow.

255. The Africa fund (Action for Resisting Invasion, Colonialism and Apartheid) under India’s leadership was instituted by

A. UNO
B. NAM
C. SAARC
D. the Commonwealth
✅ The correct answer is option B.
The Africa fund (Action for Resisting Invasion, Colonialism and Apartheid) under India’s leadership was instituted by NAM. The Africa Fund was set up in 2001 to make a difference to communities we had met in East Africa. It came on the back of 7 years of visits we had made to churches in Uganda, and then later Kenya, Tanzania & Dr Congo, and from the outset has set out to work through relationship with trusted individuals and groups.

256. Robert Koch worked on

A. diabetes
B. malaria
C. cholera
D. tuberculosis
✅ The correct answer is option D.
Robert Koch worked on tuberculosis. German physician Robert Koch was one of the founders of bacteriology. He discovered the anthrax disease cycle and the bacteria responsible for tuberculosis and cholera. He received the Nobel Prize for Physiology or Medicine in 1905 for his research on tuberculosis.

257. Rare Earth factory is situated in

A. Allepey (Kerala)
B. Alwaye (Kerala)
C. Avadi (Tamil Nadu)
D. Ambernath (Maharashtra)
✅ The correct answer is option B.
Rare Earth factory is situated in Alwaye (Kerala). Rare Earths Division (RED), Udyogamandal, Aluva is located on the banks of river Periyar in Kerala at a distance of 12 km from the Port city of Kochi and 15 km from Kochi International Airport. RED is an exclusive value adding chemical plant, wherein high pure individual rare earth compounds are produced.