Question

Assertion (A): Secondary immune response is quicker and stronger than the primary immune response.
Reason (R): Our body appears to have the memory of the first encounter therefore response to the subsequent encounter with the same pathogen is quick.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• C. (A) is true, but (R) is false.
• D. (A) is false, but (R) is true.

Hint:

Memory cells help the immune system respond faster and more robustly upon second exposure to the same antigen.

Answer 1

The Correct Option is A

Step 1: The secondary immune response surpasses the primary response in speed and efficacy, validating Assertion (A) as true.
Step 2: This enhanced response stems from memory B and T cells generated during the initial exposure, confirming Reason (R) as true.
Step 3: The existence of immunological memory directly accounts for the accelerated secondary response, establishing that (R) accurately explains (A).
Consequently, both (A) and (R) are true, with (R) providing a correct explanation for (A).