Answer: (Detailed Solution Below)
Option D: Siachin
Detailed Solution:
The correct answer is “Siachin”.
Located in the eastern Karakoram range in the Himalayas, Siachen is the largest glacier in the Indian subcontinent and one of the largest in the world outside the polar regions.
The Lambert–Fisher Glacier in Antarctica is the largest glacier in the world. The Fedchenko Glacier in Tajikistan is the longest glacier outside of the Earth's polar regions/