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Which among the following pair is an exception to Mammalia group being oviparous.

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Platypus and Echidna

Monkey and Bat

Chimpanzee and Bat

Dolphin and Monkey

answer is A.

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Detailed Solution

Mammals belong to animalia kingdom.

Platypus and Echidna are warm-blooded animals. They belong to Mammalia because they have hair on their body and produce milk from mammary glands to feed their young ones. However, they lay eggs.

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