Assertion : AIDS is an immunodeficiency disease acquired during lifetime of an individual.
Reason : It results in a reduction in the number of helper B-Cells.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false

Answer

To solve the question regarding the assertion and reason about AIDS, we can follow these steps:

### Step 1: Understand the Assertion
The assertion states that "AIDS is an immunodeficiency disease acquired during the lifetime of an individual."
- **Explanation**: This is true. AIDS (Acquired Immunodeficiency Syndrome) is indeed a disease that is acquired and is characterized by a weakened immune system.

### Step 2: Understand the Reason
The reason provided is "It results in a reduction in the number of helper B-Cells."
- **Explanation**: This statement is incorrect. AIDS primarily affects T-helper cells (also known as CD4+ T cells), not B cells. B cells are responsible for antibody production, but they are not the primary targets of HIV.

### Step 3: Analyze the Relationship
Now we need to analyze the relationship between the assertion and the reason.
- The assertion is true, but the reason is false. The reduction in immune function is due to the loss of T-helper cells, not B cells.

### Step 4: Conclusion
Based on the analysis:
- The assertion is true, and the reason is false. Therefore, the correct answer is that the assertion is true, but the reason is false.

### Final Answer
The correct option is: "Assertion is true, but the reason is false."

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