Consider the following the statements regarding 'Gangetic Dolphin' :

1. The Gangetic River Dolphin has been categorized as 'endangered' under the IUCN's Red List.

2. It does not have crystalline eye lens rendering it effectively blind.

3. Navigation are and hunting carried out using echolocation. It has been recognized

4. as India's National Aquatic Animal.

Which of the above statements are correct?