Assertion The collenchyma is a thick-walled living tissue.
Reason The collenchyma is thickened due to deposition of pectin.

Options

A. If both the assertion and reason are true and reason is correct explanation of the assertion .
B. If both the assertion and reason are true but reason is not a correct explanation of the assertion .
C. If the assertion is true but the reason is false.
D. If both assertion and reason are false.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Assertion:**
- The assertion states that "the collenchyma is a thick-walled living tissue."
- Collenchyma is indeed a type of plant tissue characterized by its thickened cell walls, which provide support and flexibility to the plant.

2. **Understanding the Reason:**
- The reason states that "the collenchyma is thickened due to deposition of pectin."
- While pectin is one of the components that contribute to the thickening of collenchyma cell walls, it is not the only one. The walls also contain cellulose and hemicellulose.

3. **Analyzing the Assertion and Reason:**
- The assertion is true because collenchyma is a thick-walled living tissue.
- The reason is partially true but incomplete. It fails to mention that cellulose and hemicellulose also contribute to the thickening of collenchyma walls.

4. **Conclusion:**
- Since the assertion is true and the reason is false (due to its incomplete explanation), we can conclude that the correct relationship is that the assertion is true, but the reason is false.

**Final Answer:** The assertion is true, but the reason is false.

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