Answer: Option A. -> Unmanned station located in Antarctica
Answer: (a)
Dakshin Gangotri was the first scientific base station of India situated in Antarctica, part of the Indian Antarctic Program.
Established during the third Indian expedition to Antarctica in 1983–84, it was an unmanned station, set up using indigenous Indian equipment, powered by Solar energy. The station was entirely computerized to record all data that was researched.

Answer: Option A. -> Syntaxial bending of geologically young Himalayas
Answer: (a)

Answer: Option D. -> Brahmaputra
Answer: (d)
Brahmaputra River, also called Tsangpo-Brahmaputra, is a transboundary river and one of the major rivers of Asia. With its origin from Talung Tso Lake in southwestern Tibet as the Yarlung Tsangpo River, it flows across southern Tibet to break through the Himalayas in great gorges (including the Yarlung Tsangpo Grand Canyon) and into Arunachal Pradesh (India) where it is known as Dihang or Siang.
It flows southwest through the Assam Valley as Brahmaputra and south through Bangladesh as the Jamuna ( not to be mistaken with Yamuna of India). In the vast Ganges Delta, it merges with the Padma, the main distributary of the Ganges, then the Meghna, before emptying into the Bay of Bengal.

Answer: Option C. -> Lagoon of Kerala
Answer: (c)

Answer: Option A. -> Bhubaneswar - Mahanadi
Answer: (a)

Answer: Option B. -> Ganga
Answer: (b)The Gandak River, river in central Nepal and Northern India is a left bank tributary of the Ganges in India.

Answer: Option A. -> Padma
Answer: (a)River Ganga after entering Bangladesh is known by Padma.

Answer: Option A. -> Only 2 and 3
Answer: (a)

Answer: Option D. -> Ganga Canal
Answer: (d)

Answer: Option C. -> Bhagirathi and Bhilangana
Answer: (c)