A : After menopause the levels of blood gonadotropins will rise markedly .
R : At the time of menopause all the ovarian follicles are converted into follicular atresia and the ovaries are not responding to the gonadotropins

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2)
C. If Assertion is true statement but Reason is false then mark (3)
D. If both Assertion and Reason are false statement then Mark (4)

Answer

To solve the question regarding the assertion (A) and reason (R) statements about menopause and gonadotropins, we can break it down into clear steps:

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that after menopause, the levels of blood gonadotropins will rise markedly. This is true because, during menopause, the ovaries stop producing estrogen due to the depletion of ovarian follicles. As a result, the body responds by increasing the production of gonadotropins (FSH and LH) from the pituitary gland to try to stimulate the ovaries.

2. **Understanding the Reason (R)**:
- The reason states that at the time of menopause, all the ovarian follicles are converted into follicular atresia, and the ovaries do not respond to gonadotropins. This is also true. Follicular atresia refers to the degeneration of ovarian follicles that do not mature into eggs. As menopause approaches, most follicles have undergone atresia, leading to a lack of response from the ovaries to the increased levels of gonadotropins.

3. **Analyzing the Relationship Between A and R**:
- While both the assertion and the reason are true, the reason does not adequately explain the assertion. The rise in gonadotropin levels occurs due to the lack of estrogen feedback, while the ovaries' non-responsiveness to gonadotropins is a consequence of the atresia of follicles, not the cause of the rise in gonadotropins.

4. **Conclusion**:
- Therefore, we conclude that the assertion (A) is true, and the reason (R) is also true, but the reason does not correctly explain the assertion. The correct answer to the question is that both statements are true, but the reason is not the correct explanation for the assertion.

### Final Answer:
- **Assertion (A)**: True
- **Reason (R)**: True, but does not explain (A)