Euro-II norms stipulate that sulphur should be controlled at

Options

A. 350 ppm in petrol and 150 ppm in diesel
B. 350 ppm in diesel and 150 ppm in petrol
C. 50 ppm in petrol and 250 ppm in diesel
D. 150 ppm in petrol and 50 ppm in diesel

Answer

To solve the question regarding Euro-II norms and the control of sulphur levels in petrol and diesel, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Euro-II Norms**: Euro-II norms are regulations aimed at reducing vehicular emissions and improving air quality. They set limits on various pollutants, including sulphur content in fuels.

2. **Identify the Sulphur Limits**: According to Euro-II norms, specific limits are set for sulphur content in petrol and diesel. We need to determine the correct values stipulated by these norms.

3. **Analyze the Options**: The options provided are:
- A. 350 ppm in petrol and 150 ppm in diesel
- B. 350 ppm in diesel and 150 ppm in petrol
- C. 50 ppm in petrol and 250 ppm in diesel
- D. 150 ppm in petrol and 50 ppm in diesel

4. **Recall the Correct Values**: Based on the Euro-II norms, the sulphur content should be:
- 150 ppm in petrol
- 350 ppm in diesel

5. **Match with Options**: Now, we compare these values with the options provided:
- Option A states 350 ppm in petrol and 150 ppm in diesel (Incorrect)
- Option B states 350 ppm in diesel and 150 ppm in petrol (Correct)
- Option C states 50 ppm in petrol and 250 ppm in diesel (Incorrect)
- Option D states 150 ppm in petrol and 50 ppm in diesel (Incorrect)

6. **Conclusion**: The correct answer is **B. 350 ppm in diesel and 150 ppm in petrol**.

### Final Answer:
**B. 350 ppm in diesel and 150 ppm in petrol**