Assertion :- Testes originate in the abdomen but but later descend into the secrtum under the influence of testoserone
Reason :- The interstitial (Leydig's) cells of the testes sevrete male sex hormone , the testoserone .

Options

A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion .
B. If both Assertion and Reason are true but Reason is not 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 the testes originate in the abdomen and later descend into the scrotum under the influence of testosterone.
- This is true as the testes develop in the abdominal cavity during fetal development and descend into the scrotum before birth.

2. **Understanding the Reason:**
- The reason provided is that interstitial (Leydig) cells of the testes secrete the male sex hormone, testosterone.
- This is also true; Leydig cells are responsible for the production of testosterone, which plays a crucial role in male sexual development.

3. **Analyzing the Relationship:**
- While both the assertion and reason are true, the reason does not explain why the testes descend into the scrotum.
- The descent of the testes is primarily to maintain a lower temperature necessary for spermatogenesis, which is not directly explained by the secretion of testosterone.

4. **Conclusion:**
- Therefore, both the assertion and reason are correct, but the reason does not adequately explain the assertion.
- The correct answer is that both the assertion (E) and reason (R) are true, but R is not the correct explanation of E.

**Final Answer:**
Both the assertion and reason are true, but the reason does not explain the assertion.

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