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

The correct option is Nagarjunasagar-Srisailam.

Critical Tiger Habitats (also known as the core areas of tiger reserves) are established under the Wild Life (Protection) Act, 1972. Among the tiger reserves in India, Nagarjunasagar-Srisailam Tiger Reserve (located in Andhra Pradesh and Telangana) has the largest area under Critical Tiger Habitat.
Here is a comparison of the Critical Tiger Habitat (Core Area) of the options provided:
- Nagarjunasagar-Srisailam: Approximately 2,595.72 square kilometers
- Sundarbans: Approximately 1,699.62 square kilometers
- Ranthambore: Approximately 1,113.36 square kilometers
- Corbett: Approximately 821.99 square kilometers

Therefore, Nagarjunasagar-Srisailam is the correct answer as it possesses the largest critical habitat area among the given options.