The protected area famous for its tiger population:

Bandipur National Park
Dandeli Wildlife Sanctuary
Bhadra Wildlife Sanctuary
Nagarhole National Park

The correct answer is: Nagarhole National Park.

Nagarhole National Park is a national park in the Indian state of Karnataka. It is located in the Western Ghats, and is part of the Nilgiri Biosphere Reserve. The park is known for its tiger population, and is also home to a variety of other wildlife, including elephants, leopards, deer, and birds.

Bandipur National Park is a national park in the Indian state of Karnataka. It is located in the Western Ghats, and is part of the Nilgiri Biosphere Reserve. The park is known for its tiger population, and is also home to a variety of other wildlife, including elephants, leopards, deer, and birds.

Dandeli Wildlife Sanctuary is a wildlife sanctuary in the Indian state of Karnataka. It is located in the Western Ghats, and is part of the Dandeli-Anshi Tiger Reserve. The sanctuary is known for its tiger population, and is also home to a variety of other wildlife, including elephants, leopards, deer, and birds.

Bhadra Wildlife Sanctuary is a wildlife sanctuary in the Indian state of Karnataka. It is located in the Western Ghats, and is part of the Bhadra Tiger Reserve. The sanctuary is known for its tiger population, and is also home to a variety of other wildlife, including elephants, leopards, deer, and birds.

In conclusion, the correct answer is Nagarhole National Park.