A: Typhlosole is the characteristic dorsal median fold in the intestine of earthworm.
R: Typhlosole secretes intestinal juice containing digestive enzymes.

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 statements, then mark (4).

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Typhlosole is the characteristic dorsal median fold in the intestine of earthworm."
- This statement is true. The typhlosole is indeed a prominent structure found in the intestine of earthworms, specifically a fold that runs along the dorsal side.

2. **Understanding the Reason**:
- The reason states that "Typhlosole secretes intestinal juice containing digestive enzymes."
- This statement is false. The typhlosole itself does not secrete digestive juices. Instead, the secretion of digestive enzymes is done by glandular cells present in the intestinal lining.

3. **Conclusion**:
- Since the assertion is true and the reason is false, we can conclude that the correct answer is option 3: "Assertion is true statement but reason is false."

### Final Answer:
The correct answer is **3** (Assertion is true but reason is false).

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