Assertion :In molluscs, feather-like gills are present in mantle cavity. Reason: These gills have respiratory and excretory functions.

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
In molluscs, the space between the mantle and the hump is called the mantle cavity in which feather-like gills are present. They have both respiratory and excretory functions.
So, the correct answer is 'B'.

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