The correct answer is option 2, Assam. Kaziranga National Park is located in the state of Assam, India. It is a famous wildlife sanctuary known for its population of Indian rhinoceros. The park is situated in the Golaghat and Nagaon districts of Assam and covers an area of about 430 square kilometers. Kaziranga National Park was declared a UNESCO World Heritage Site in 1985 due to its rich biodiversity and conservation efforts.

Option 1, Karnataka, is incorrect. While Karnataka has several national parks and wildlife sanctuaries, Kaziranga National Park is not one of them.

Option 3, Gujarat, is incorrect. Gujarat is home to the Gir National Park, known for its Asiatic lions, but it is not where Kaziranga National Park is located.

Option 4, Rajasthan, is incorrect. Rajasthan has multiple wildlife sanctuaries and national parks, such as Ranthambore National Park and Sariska Tiger Reserve, but Kaziranga National Park is not located in Rajasthan.

In conclusion, the correct answer is option 2, Assam, for the location of Kaziranga National Park.