Assertion: In the anus of earthworm, depressor muscles are found.
Reason: These muscles help in the elimination of excretion from rectum

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

Answer

To analyze the assertion and reason provided in the question, we will break down the information step by step.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "In the anus of earthworm, depressor muscles are found."
- This is true; earthworms have anal depressor muscles that play a role in their excretory system.

2. **Understanding the Reason**:
- The reason states that "These muscles help in the elimination of excretion from the rectum."
- This is also true; the anal depressor muscles assist in the process of defecation by allowing the rectum to fill and then facilitating the expulsion of waste.

3. **Evaluating the Relationship**:
- We need to determine if the reason is the correct explanation of the assertion.
- The anal depressor muscles indeed help in the elimination of waste from the rectum, which supports the assertion that these muscles are present in the anus of the earthworm.

4. **Conclusion**:
- Both the assertion and the reason are true, and the reason correctly explains the assertion.
- Therefore, the correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

### Final Answer:
Both the assertion and reason are true, and the reason is the correct explanation of the assertion.

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