Assertion: stomate are found on the surface of leaves in gymnosperms
Reason: In gymnosperms, cuticle leaves are thin

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.

Explanation

To solve the question regarding the assertion and reason related to stomata in gymnosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "stomata are found on the surface of leaves in gymnosperms."
- **Analysis**: This statement is true. Gymnosperms, like conifers, do have stomata on their leaf surfaces, but they are often sunken to reduce water loss.

2. **Understanding the Reason**: The reason states that "in gymnosperms, cuticle leaves are thin."
- **Analysis**: This statement is false. In fact, gymnosperms typically have a thick cuticle on their leaves, which helps to prevent water loss, especially in harsh environments.

3. **Evaluating the Relationship**: Now we need to determine if the reason correctly explains the assertion.
- Since the assertion is true but the reason is false, the reason does not provide a correct explanation for the assertion.

4. **Choosing the Correct Option**: Based on the evaluations:
- Option 1: Both assertion and reason are true, and the reason is the correct explanation of the assertion. (Incorrect)
- Option 2: Both assertion and reason are true, but the reason is not the correct explanation of the assertion. (Incorrect)
- Option 3: Assertion is true, but reason is false. (Correct)
- Option 4: Both assertion and reason are false. (Incorrect)

Thus, the correct answer is **Option 3: Assertion is true, but reason is false.**