A: Gossypol inhibits spermatogenesis.
R: Centchroman inhibits ovulation.

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 reasons is not the correct expalanation 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 statements, then mark (4).

Answer

### Step-by-Step Solution:

1. **Identify the Assertion (A)**: The assertion states that "Gossypol inhibits spermatogenesis."
- **Explanation**: Gossypol is a natural phenolic compound derived from the cotton plant (genus Gossypium). It is known to interfere with the process of spermatogenesis, which is the formation of sperm in the testes. Therefore, this assertion is true.

2. **Identify the Reason (R)**: The reason states that "Centchroman inhibits ovulation."
- **Explanation**: Centchroman is a drug used as a contraceptive. It acts on estrogen receptors and primarily prevents the implantation of a fertilized ovum in the uterus. It does not inhibit ovulation directly; rather, it can delay ovulation by prolonging the follicular phase in the ovary. Thus, this reason is false.

3. **Determine the Relationship**: The assertion is true, while the reason is false.
- **Conclusion**: In assertion-reason questions, if the assertion is true and the reason is false, the correct answer is that the assertion is true, but the reason is not a correct explanation of the assertion.

4. **Select the Correct Option**: Based on the analysis, the correct option is the one that states the assertion is true and the reason is false.

### Final Answer:
The correct option is the third one: Assertion (A) is true, and Reason (R) is false.

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