Among the following Tiger Reserves, which one has the largest area under "Critical Tiger Habitat"?

Nagarjunsagar-Srisailam Tiger Reserve (Andhra Pradesh/Telangana) holds the largest "Critical Tiger Habitat" in India, covering an area of approximately 2,595 sq km. While the Sunderbans is a vast and famous ecosystem, its designated CTH area is significantly smaller (around 1,699 sq km), making it a common but incorrect choice based on perceived landscape size. The core concept tested is the factual knowledge of India’s Protected Area Network and the administrative zoning of Tiger Reserves under the Wildlife Protection Act, 1972.