Explanation:

- Siachen Glacier is located near Nubra Valley:

- Correct Answer: Option 1 - Nubra Valley

- Siachen Glacier lies in the eastern Karakoram Range in the Himalayas, near Nubra Valley.

- The region is known for its strategic significance and harsh climate.

- Doon Valley:

- Located in northern India, between the Himalayas and Shivalik hills.

- Known for its proximity to Dehradun, the state capital of Uttarakhand.

- Silent Valley:

- A part of the Western Ghats in Kerala, India.

- Famous for its biodiversity and tropical rainforest.

- Neelam Valley:

- Situated in Pakistan-administered Azad Kashmir.

- Known for its scenic beauty and lush landscapes.