The highest peak in Arunachal Pradesh, Kangto, has an elevation of approximately:

The correct answer is (c). Kangto has an elevation of 8,598 meters (28,251 feet). It is the highest peak in Arunachal Pradesh, India, and the 24th highest peak in India. It is located in the Kangto Range, which is part of the Eastern Himalayas. The peak is named after the Kangto village, which is located near the base of the mountain. Kangto is a popular trekking destination, and there are several routes to the summit. The best time to climb Kangto is during the spring (March-May) or autumn (September-November).

Option (a) is incorrect because Kangto is much higher than 6,000 meters. Option (b) is incorrect because Kangto is much higher than 7,000 meters. Option (d) is incorrect because Kangto is slightly lower than 8,500 meters.