Which group of mammals is devoid of hair?

Cetacea

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Rodentia

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Hyracoidea

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Carnivora

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Solution

The correct option is A Cetacea
The infra-order Cetacea includes the marine mammals commonly known as whales, dolphins and porpoises. Cetaceans are nearly hairless and are insulated from the cooler water they inhabit by a thick layer of blubber and thus they do not need of body hairs. Hence, option A is correct.

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