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Q.

Which of the following mammals lays eggs?

 

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a

Whale
 

b

Mongoose
 

c

Platypus
 

d

Mole

answer is C.

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Detailed Solution

Concept: Platypus (Ornithorhynchus anatinus) belong to the monotreme family of mammals. Echidnas are also included in this group. 
They are the only mammals that can lay eggs. 
As a result, monotremes are an excellent model organism for studying mammalian evolution.
Hence, option C is the correct answer.

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