This question requires classification of the given species, (Crocodile and Elephant), based on their conservation status in India.

Option-1, `only 1`, suggests that only Crocodiles are endangered. This is incorrect as Crocodiles are listed in threatened species but not in endangered list.

Option-2, `only 2`, implies that only Elephants are endangered. Elephants are indeed listed as endangered, but this option is also incorrect as it doesn`t acknowledge that Crocodiles are also under threat.

Option-3, `both 1 and 2`, suggests that both Crocodiles and Elephants are endangered. This option is correct as both species have been identified as facing potential risk of extinction due to habitat loss, human-wildlife conflict and climate change.

Option-4, `neither 1 nor 2`, suggests that neither species is endangered, which is incorrect as both of these species are under significant threat in India.