Assertion : CAM plants lack structural compartmentation of leaf, as found in `C_(4)` plant
Reason : Stomata of CAM plants are open during the day.

Options

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

Answer

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 "CAM plants lack structural compartmentation of leaf, as found in C4 plants."
- CAM (Crassulacean Acid Metabolism) plants do not have the specialized leaf structure known as Kranz anatomy, which is characteristic of C4 plants.
- Therefore, this part of the assertion is **true**.

2. **Understanding the Reason**:
- The reason states that "Stomata of CAM plants are open during the day."
- In reality, CAM plants have a unique adaptation where their stomata are **closed during the day** to minimize water loss and are **open at night** to take in carbon dioxide.
- This means the reason provided is **false**.

3. **Conclusion**:
- Since the assertion is true and the reason is false, the correct relationship between the two is that the assertion is correct, but the reason is incorrect.

### Final Answer:
- Assertion is true, but the reason is false.