Answer : 2. "Tamil Nadu"
Explanation :

The Tamil Nadu Forest Department has begun a three-day elephant census at Sathyamangalam Tiger Reserve, located at the junction of the Eastern and Western Ghats in the Nilgiri Biosphere Reserve. Spread over 1,411.6 sq km, it was declared a tiger reserve in 2013, promoting a sustainable habitat for tigers and other wildlife. The reserve has the world's largest tiger population, with over 280 tigers, and is home to indigenous tribes such as the Irula and Kurumba.