Discussion
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?
Answer: D
All four are correct: All of the above.
The Ganges river dolphin (Platanista gangetica) is listed as Endangered on the IUCN Red List (1). It lives in murky water and its eyes lack a crystalline lens, so it is practically blind (2), and it navigates and hunts by echolocation, emitting clicks and listening for the echoes (3). It was declared India's National Aquatic Animal in 2009 (4).
Since every statement is true, each narrower option is incomplete.
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