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The secondary immune response...

The secondary immune response

A

takes longer time to develop

B

is quicker and more intense

C

is feeble and decline rapidly

D

both (1) & (2)

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Secondary Immune Response**: The secondary immune response refers to the immune reaction that occurs upon the second and subsequent exposures to the same antigen. This response is characterized by a more rapid and robust reaction compared to the primary immune response. 2. **Characteristics of the Secondary Immune Response**: - **Quicker Response**: The secondary immune response is quicker than the primary response because the immune system has already been exposed to the antigen and has memory cells (B cells and T cells) that can respond more rapidly. - **More Intense Response**: The intensity of the secondary immune response is greater because of the presence of memory cells that produce a larger quantity of antibodies in response to the same antigen. 3. **Analyzing the Options**: - **Option A**: "Takes longer time to develop" - This is incorrect as the secondary immune response is quicker. - **Option B**: "Quicker and more intense" - This is correct as explained above. - **Option C**: "People and decline rapidly" - This option is misleading and does not accurately describe the secondary immune response. - **Option D**: "Both A and B" - Since A is incorrect, this option is also incorrect. 4. **Conclusion**: Based on the characteristics of the secondary immune response, the correct answer is **Option B: Quicker and more intense**.
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