The correct answer is: 2002.
Kalesar National Park is a national park in the Indian state of Haryana. It was declared a national park in 2002. The park is located in the district of Yamunanagar. It is spread over an area of 224.5 square kilometers. The park is home to a variety of wildlife, including tigers, leopards, sloth bears, wild boars, and deer. The park is also home to a variety of birds, including peacocks, flamingos, and pelicans. The park is a popular tourist destination.
Option A: 2000 is incorrect because Kalesar National Park was not declared a national park in 2000.
Option B: 2001 is incorrect because Kalesar National Park was not declared a national park in 2001.
Option C: 2002 is the correct answer because Kalesar National Park was declared a national park in 2002.
Option D: 2003 is incorrect because Kalesar National Park was not declared a national park in 2003.