Consider the following statements regarding the ‘Gangetic Dolphin’:
1. The Gangetic River Dolphin has been categorized as ‘endangered’ under the IUCN’s Red List.
2. It does not have a crystalline eye lens rendering it effectively blind.
3. Navigation and hunting are carried out using echolocation.
4. It has been recognized as India’s National Aquatic Animal. Which of the above statements are correct?
- AOnly 1, 2 and 4
- BOnly 2, 3 and 4
- COnly 1, 3 and 4
- DAll of the above
Show answer and explanation
Correct answer: (d) All of the above
Explanation
The Gangetic River Dolphin is listed as Endangered on the IUCN Red List and is India's National Aquatic Animal.
It lacks a crystalline eye lens, making it effectively blind, so it relies on echolocation to navigate and hunt.
All four statements (1, 2, 3 and 4) are therefore correct.