Which of the following statements are incorrect regarding the Euro II norms ?

Options

A. It stipulates that sulphur be controlled at 350 ppm in diesel
B. It stipulates that sulphur be controlled at 150 ppm in petrol.
C. Aromatic hydrocarbons are to be contained at 42 % of the concerned fuel.
D. None of these

Answer

To determine which statements regarding the Euro II norms are incorrect, we will analyze each statement one by one based on the information provided.

### Step-by-Step Solution:

1. **Understanding Euro II Norms**:
- Euro II norms were introduced to control air pollution from vehicles. They set specific limits on the emissions of harmful substances from vehicles.

2. **Analyzing the First Statement**:
- The first statement claims that Euro II norms stipulate that sulfur be controlled at 350 ppm in diesel.
- **Evaluation**: This statement is true. Euro II norms do set a limit of 350 ppm for sulfur in diesel fuel to reduce air pollution.

3. **Analyzing the Second Statement**:
- The second statement states that sulfur will be controlled at 150 ppm in petrol.
- **Evaluation**: This statement is also true. Euro II norms specify a limit of 150 ppm for sulfur in petrol to minimize emissions.

4. **Analyzing the Third Statement**:
- The third statement mentions that aromatic hydrocarbons are to be contained at 40% of the concerned fuel.
- **Evaluation**: This statement is true as well. Euro II norms set limits on the amount of aromatic hydrocarbons to control air pollution.

5. **Conclusion**:
- Since all three statements provided in the question are true and align with the Euro II norms, we conclude that none of the statements are incorrect.
- Therefore, the correct answer is that none of the statements are wrong.

### Final Answer:
- The correct answer is: **None of these statements are incorrect regarding the Euro II norms.**