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Assertion(A): According to Allen's rule, mammals from warmer climates generally have shorter ears and limbs to minimise heat loss.
Reason(R): In the polar seas, aquatic mammals like seals have a thick layer of fat below their skin that acts as an insulator and reduces loss of body heat.

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Both A and R are true and R is the correct explanation of A.

Both A and R are true but R is NOT the correct explanation of A.

A is true but R is false.

A is false but R is true.

answer is D.

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Detailed Solution

Allen’s rule-Mammals from colder climates generally have shorter ears and limbs to minimise heat loss.
Thick fat layer (blubber) acts as an insulator that reduces the loss of body heat of aquatic mammals in polar seas.

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