Answer : 4. "Tripura"
Explanation :

The Sipahijala Wildlife Sanctuary in Tripura has recently welcomed new additions including two Royal Bengal Tigers, two leopards, four golden pigeons, a silver pigeon, two peacocks and four mountain mynas. Established in 1972, the sanctuary is spread over 18.5 sq km, with sections for a variety of animals. It has diverse flora with 456 plant species and diverse fauna, including primates, leopards, clouded leopards and a reintroduced crab-eating mongoose. The sanctuary also has a rich bird population with species like winged stork and white ibis.