Assertion (A): UV radiation causes photodissociation of ozone into `O_(2)` and O, thus causing damage to the stratospheric change.
Reason (R): Ozone hole is resulting in global warming and climate change.

Options

A. If both Assertion and Reason are true and Reason is 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 and false.

Answer

To analyze the given assertion and reason, let's break down the information step by step.

### Step 1: Understand the Assertion
**Assertion (A)** states that UV radiation causes photodissociation of ozone into `O2` and `O`, which leads to damage in the stratosphere.

- **Photodissociation** refers to the process where a molecule is broken down into smaller components by the absorption of light (in this case, UV radiation).
- Ozone (O3) absorbs UV radiation, leading to its breakdown into molecular oxygen (O2) and atomic oxygen (O).

### Step 2: Understand the Reason
**Reason (R)** claims that the ozone hole results in global warming and climate change.

- The ozone hole refers to the depletion of the ozone layer, primarily caused by chlorofluorocarbons (CFCs) and other ozone-depleting substances.
- While the thinning of the ozone layer can allow more UV radiation to reach the Earth's surface, it is not the direct cause of global warming. Global warming is primarily driven by the increase in greenhouse gases, such as carbon dioxide (CO2), which trap heat in the atmosphere.

### Step 3: Analyze the Relationship Between Assertion and Reason
- The assertion is true because UV radiation does indeed cause the photodissociation of ozone.
- The reason is false because the ozone hole itself is not a significant contributor to global warming; rather, global warming is mainly due to increased levels of CO2 and other greenhouse gases.

### Conclusion
Based on the analysis:
- The assertion is true.
- The reason is false.

Thus, the correct option is that the assertion is true, but the reason is false.

### Final Answer
**Assertion (A) is true, and Reason (R) is false.**

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