The correct answer is option 4, Corbett National Park. Corbett National Park is the first national park established in India. It was established in 1936 as Hailey National Park and was later renamed as Ramganga National Park. In 1957, it was again renamed as Corbett National Park in honor of Jim Corbett, a well-known conservationist and author. Located in the state of Uttarakhand, Corbett National Park is famous for its diverse flora and fauna, including the endangered Bengal tiger. It is spread across an area of 520 square kilometers and is known for its picturesque landscapes and rich biodiversity. Its establishment paved the way for the conservation and protection of wildlife in India, leading to the creation of numerous other national parks across the country.