Protherians are mammals which......

Options :
  1. Give birth to live but immature young ones
  2. Give birth to live young ones and uses placenta
  3. Lay eggs
  4. None of the above
Answer and Explanation :-

Answer: Option 3

Explanation:

Prototherians are mammals which lay eggs. Most of the animals in this group are extint.A good example is platypus which is native to Australia.

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