Explanation:

- Option 1: Gilly Arjan Singh

- Known for wildlife conservation efforts in India.

- Not specifically famous as an ornithologist.

- Option 2: Jim Corbett

- Renowned hunter and conservationist.

- Famous for his work in setting up wildlife reserves, like Jim Corbett National Park.

- Not primarily an ornithologist.

- Option 3: Dr. Salim Ali

- ?? A pioneering Indian ornithologist.

- Known as the "Birdman of India" for his comprehensive bird studies.

- Made significant contributions to ornithology.

- Option 4: Kailash Sankhala

- Known for efforts in tiger conservation.

- Involved in Project Tiger but not ornithology.

- Option 5: Sunderlal Bahuguna

- A noted environmentalist known for the Chipko Movement.

- Not an ornithologist.

Correct Answer: Option 3 - Dr. Salim Ali