The correct option is A Crocodile
Except crocodile, humans, elephants, and dogs are viviparous organisms. Viviparous organisms are those who give birth to young ones and feed them milk. Viviparous organisms have hair on their body and have pinna, which is the outer ear.
In contrast, the crocodile is an oviparous organism that lays eggs to reproduce. Oviparous organisms do not have hair on their body or have pinna.