Assertion :Secondary immune response is quicker and stronger than the primary one. Reason: Memory cells conversant with the recoming antigens are ready to combat the invaders.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
A) Assertion is correct as the secondary immune response to an infection is always stronger and faster than the primary response. Reason is correct as memory cells remember the antigen during the primary response and hence can react more efficiently during the secondary response. Hence, Reason is the correct explanation.
B) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
C) Reason is correct.
D) Both Assertion and Reason are correct.
So the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.

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