which among these is a Egg laying mammals?

which among these is a Egg laying mammals?

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Options

1) platypus

2) Lion

3) tiger

4) wolf

answer

1) platypus

Other details

The platypus (Ornithorhynchus anatinus) also known as the duck-billed platypus is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania. 

It is one of the few venomous mammals

Together with the four species of echidna, it is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.