Which of the following statements is wrong ?

Options

A. Ozone is not responsible for greenhouse effect.
B. Ozone can oxidise sulphur dioxide present in the atmosphere to sulphur troxide.
C. Ozone hole is thinning of ozone layer present in the stratosphere.
D. Ozone is produced in upper stratosphere by the action of UV rays on oxygen.

Explanation

To solve the question "Which of the following statements is wrong?", we will analyze each statement provided in the options to identify the incorrect one.

### Step-by-Step Solution:

1. **Analyze Statement 1**: "Ozone is not responsible for greenhouse effect."
- **Explanation**: Ozone (O3) is indeed a greenhouse gas. It absorbs and emits infrared radiation, contributing to the greenhouse effect. Therefore, this statement is incorrect.

2. **Analyze Statement 2**: "Ozone can oxidize sulfur dioxide present in the atmosphere to sulfur trioxide."
- **Explanation**: This statement is correct. Ozone can react with sulfur dioxide (SO2) in the atmosphere, oxidizing it to form sulfur trioxide (SO3).

3. **Analyze Statement 3**: "Ozone hole is thinning, that is, ozone is thinning of ozone layer present in the stratosphere."
- **Explanation**: This statement is also correct. The ozone layer in the stratosphere is indeed thinning due to pollutants, particularly chlorofluorocarbons (CFCs), which lead to the depletion of ozone.

4. **Analyze Statement 4**: "Ozone is produced in upper stratosphere by the action of UV rays on oxygen."
- **Explanation**: This statement is correct as well. Ozone is formed in the upper stratosphere when ultraviolet (UV) rays from the sun interact with molecular oxygen (O2), leading to the formation of ozone (O3).

### Conclusion:
After analyzing all the statements, we find that:
- Statement 1 is incorrect: "Ozone is not responsible for greenhouse effect."
- Statements 2, 3, and 4 are correct.

Thus, the answer to the question is that the first statement is wrong.