Which of the following animals is not viviparous?
Platypus
Viviparous animals give birth to living young that are nourished by mammary glands and they belong to the class Mammalia. Viviparous animals differ from egg-laying animals, such as birds and most reptiles. Humans, dogs, whale, flying fox(bat), elephant, and cats are viviparous animals. Platypus is an egg-laying mammal.