Explanation:

Siachen Glacier: It is located in the East Karakoram/Himalaya, at approximately 35.5° N 76.9° E. It is one of the five largest glaciers in the Karakoram, situated at an average altitude of 5,400 meters (~17,700 feet) above sea level. Most of the Siachen Glacier as is the LoC, a hotly contested territory between Pakistan and India.The Siachen glacier lies South of the great watershed that separates Central Asia from the Indian subcontinent, and Pakistan from China in this region. The 78 km long Siachen glacier lies between the Saltoro ridge line to the west and the main Karakoram range to the east. The Saltoro ridge originates from the Sia Kangri peak in the Karakoram range and the altitudes range from 5500 to 7300 m (18,000 to 24,000 feet). The major passes on this ridge are Sia La at 6100 m (20,000 ft) and Bila Fond La at 5800 m (19,000 ft).

Hence option 4th is correct.