Assertion: Spermatogenesis occurs in the seminiferous tubules and testosterone secretion takes place in the interstitial cells of the testes.
Reason: Growth and maturation of secondary sex organs and the development of accessory sex characters are brought out by testosterone.

Options

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

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "spermatogenesis occurs in the seminiferous tubules and testosterone secretion takes place in the interstitial cells of the testes."
- **Explanation**: The seminiferous tubules are specialized structures within the testes where sperm production (spermatogenesis) occurs. Interstitial cells, also known as Leydig cells, are located in the spaces between these tubules and are responsible for producing testosterone.

2. **Evaluating the Reason**:
- The reason provided is that "growth and maturation of secondary sex organs and the development of accessory sex characters are brought out by testosterone."
- **Explanation**: Testosterone is indeed responsible for the development of secondary sexual characteristics in males, such as increased muscle mass, deepening of the voice, and growth of body hair, as well as the maturation of secondary sex organs like the prostate and seminal vesicles.

3. **Determining the Truth of Each Statement**:
- Both the assertion and the reason are true statements.
- **Assertion**: True, as spermatogenesis occurs in the seminiferous tubules and testosterone is secreted by interstitial cells.
- **Reason**: True, as testosterone does promote the growth and maturation of secondary sex organs and accessory sex characteristics.

4. **Analyzing the Relationship**:
- Although both statements are true, the reason does not directly explain the assertion.
- **Explanation**: The assertion focuses on the processes of spermatogenesis and testosterone secretion, while the reason discusses the effects of testosterone on secondary sexual characteristics, which is not a direct explanation of where spermatogenesis occurs.

5. **Conclusion**:
- The correct answer is that both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.

### Final Answer:
Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

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