The correct answer is (d) Kedarnath.
Kedarnath is a town and a nagar panchayat in Rudraprayag district in the Indian state of Uttarakhand. It is a Hindu pilgrimage site and one of the four Char Dhams. The Kedarnath Temple is dedicated to Lord Shiva and is one of the most important Hindu temples in India. The town is located in the Garhwal Himalayas at an altitude of 3,584 metres (11,768 ft).
The polling station at Kedarnath is located at an altitude of 3,480 metres (11,417 ft). It is the highest polling station in India. The polling station was set up in 1991 and is used to conduct elections for the Uttarakhand Legislative Assembly and the Indian Parliament.
The other options are incorrect because they are not located in the Garhwal Himalayas. Rudraprayag is located in the Garhwal Himalayas, but the polling station is located at an altitude of 1,210 metres (3,970 ft). Bhimtal is located in the Kumaon Himalayas, and Gangotri is located in the Garhwal Himalayas.