Assertion :In mammals, complex respiratory system has developed. Reason: Mammalian skin is impermeable to gases.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and mammals. Mammals have developed a complex respiratory system to get more oxygen to maintain their high metabolic rates. Hence, mammals have a complex respiratory system.
Mammalian skin is impermeable to gases so that water loss through it is minimized.

So, the correct answer is 'both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.

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