Assertion: Increase in ozone concentration near the earth's surface reduces crop yields.
Reason: Increase in ozone concentration instratosphere protects us.
Select the correct options from the following.

Options

A. Assertion is True, Reason is True, Reason is a correct explanation for Assertion.
B. Assertion is True, Reason is True, Reason is NOT a correct explanation for Assertion.
C. Assertion is True, Reason is False.
D. Assertion is False, Reason is True.

Explanation

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

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that an increase in ozone concentration near the Earth's surface reduces crop yields.
- This is true because ground-level ozone is a pollutant that can damage plant tissues, leading to reduced photosynthesis and lower crop productivity.

2. **Understanding the Reason**:
- The reason states that an increase in ozone concentration in the stratosphere protects us.
- This is also true as stratospheric ozone forms a layer that absorbs the majority of the sun's harmful ultraviolet (UV) radiation, protecting living organisms on Earth.

3. **Evaluating the Relationship**:
- The assertion and reason are both true statements, but they refer to different contexts of ozone concentration (one at ground level and the other in the stratosphere).
- The reason does not directly explain the assertion; rather, it provides a different perspective on ozone's role in the atmosphere.

4. **Conclusion**:
- Since both the assertion and reason are true, but the reason does not support the assertion, we conclude that while they are related to ozone, they do not have a cause-and-effect relationship.

### Final Answer:
- The correct option would be: Both the assertion and reason are true, but the reason is not the correct explanation for the assertion.