Assertion (A): Ozone is both beneficial and damaging
Reason (R): Stop the release of chlorofluorocarbons to protect the ozone.

Options

A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B. Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
C. Assertion is true but Reason is false.
D. Assertion is false and Reason is true.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Assertion (A)**: The assertion states that "Ozone is both beneficial and damaging." To analyze this, we need to consider the role of ozone in different layers of the atmosphere.

2. **Ozone in the Stratosphere**: Ozone is beneficial when it is located in the stratosphere, which is the upper layer of the atmosphere. In this region, ozone acts as a protective layer that filters out harmful ultraviolet (UV) radiation from the sun. This filtering effect is crucial as it helps prevent skin cancer and cataracts in humans.

3. **Ozone in the Troposphere**: Conversely, when ozone is present in the troposphere (the lower layer of the atmosphere where we live), it becomes harmful. In this layer, ozone is a pollutant and can cause respiratory problems and other health issues. Thus, the assertion is correct as ozone has both beneficial and damaging effects depending on its location in the atmosphere.

4. **Understanding the Reason (R)**: The reason states, "Stop the release of chlorofluorocarbons to protect the ozone." Chlorofluorocarbons (CFCs) are chemicals that deplete the ozone layer in the stratosphere. When CFCs are released into the atmosphere, they break down ozone molecules, leading to a thinner ozone layer and increased UV radiation reaching the Earth's surface.

5. **Impact of CFCs**: The release of CFCs is linked to various human activities, such as the use of air conditioners, refrigerators, and aerosol sprays. Therefore, stopping the release of CFCs is indeed necessary to protect the ozone layer and prevent the harmful effects of increased UV radiation.

6. **Conclusion**: Both statements (A and R) are true. However, the reason (R) does not directly explain the assertion (A). The assertion discusses the dual nature of ozone, while the reason focuses on the need to stop CFCs to protect ozone, which is a separate point. Therefore, the correct answer is that both A and R are true, but R is not the correct explanation of A.

**Final Answer**: Both A and R are true, but R is not the correct explanation of A.

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