Sultanpur National Park was established in the year ……….. .

The correct answer is D. 1971.

Sultanpur National Park is a national park in the state of Haryana, India. It was established in 1971 and is spread over an area of 1,000 hectares. The park is home to a variety of wildlife, including birds, reptiles, and mammals. It is also a popular tourist destination.

Option A is incorrect because Sultanpur National Park was established in 1971, not 2003.

Option B is incorrect because Sultanpur National Park was established in 1971, not 2001.

Option C is incorrect because Sultanpur National Park was established in 1971, not 1999.