Answer : 2. "राजाजी टाइगर रिजर्व"
Explanation :

Hog deer, which was not previously recorded in Rajaji Tiger Reserve, has recently been found there, which is an important discovery. Known for its solitary nature, it sometimes feeds in small groups when food is abundant in open fields. Generally sedentary and non-migratory, male hog deer are territorial and use glandular secretions to mark their territory. This species exhibits sexual dimorphism, with females being slightly smaller and lacking horns. Native to India, including the Himalayan foothills region, and Southeast Asia, the hog deer has also been introduced to Sri Lanka, Australia, and the United States. Preferred habitat includes dense forest, although they are often seen in clearings, grasslands and occasionally wet grasslands with changes associated with seasonal changes and food distribution.