Indian Army’s “Operation Meghdoot” was related to

Sri Lanka
Maldives
Tibet
Siachin Glacier

The correct answer is (d).

Operation Meghdoot was a military operation launched by the Indian Army in 1984 to capture the Siachen Glacier from Pakistan. The glacier is located in the Karakoram Range in the Himalayas, and is the highest battlefield in the world. The operation was successful, and India has controlled the glacier ever since.

The other options are incorrect. Sri Lanka is an island country in the Indian Ocean, and the Maldives is an island country in the Indian Ocean. Tibet is a region in China.