The correct answer is (a) 1986.
Nanda Devi National Park is a national park in the Garhwal Himalayas in the Indian state of Uttarakhand. It was established in 1986 and is India’s first national park. The park is home to a variety of wildlife, including snow leopards, Himalayan tahr, musk deer, and ibex. It is also home to the Nanda Devi peak, which is the second-highest peak in India.
The park is a popular destination for trekking, mountaineering, and wildlife viewing. It is also a UNESCO World Heritage Site.
Here is a brief description of each option:
(a) 1986: This is the correct answer. Nanda Devi National Park was established in 1986.
(b) 1982: This is incorrect. Nanda Devi National Park was not established in 1982.
(c) 1985: This is incorrect. Nanda Devi National Park was not established in 1985.
(d) 1984: This is incorrect. Nanda Devi National Park was not established in 1984.