Answer : 4. "Assam"
Explanation :

The National Green Tribunal (NGT) has asked the Assam Chief Secretary to identify the officials responsible for granting permission for construction activities in the Sonai Rupai Wildlife Sanctuary. Established in 1998, the sanctuary is located adjacent to the Great Himalayan Range in Sonitpur district of Assam. Its climate is subtropical, with heavy rainfall and the risk of flooding from rivers such as the Burhi Dihing and Namchang.