What is true about the Euro II norms ?

Options

A. It stipulates to control sulphur at 350 ppm in diesel and 150 ppm in petrol
B. It stipulates to reduce sulphur levels to 50 ppm in petrol and diesel
C. It stipulates to reduce sulphur levels 200 ppm in diesel and in petrol
D. It stipulates to reduce sulphur at 200 ppm in diesel and 100 ppm in petrol

Answer

### Step-by-Step Solution:

1. **Understanding Euro II Norms**: Euro II norms refer to the permissible emission levels for vehicles, specifically petrol and diesel vehicles, that were implemented in Europe. These norms were designed to control the amount of pollutants emitted by vehicles to improve air quality.

2. **Implementation in India**: The Indian government adopted these Euro II norms after the Euro I norms. Euro I norms were implemented in India in the year 2000, while Euro II norms were adopted in 2005.

3. **Emission Standards**: According to Euro II norms, specific limits were set for sulfur content in fuels. The norms stipulated that sulfur levels should be controlled at:
- 350 parts per million (ppm) in diesel
- 150 ppm in petrol

4. **Control of Aromatic Hydrocarbons**: In addition to sulfur levels, Euro II norms also required a reduction in aromatic hydrocarbons by 42% in both petrol and diesel fuels.

5. **Evaluating the Options**:
- **Option 1**: States that it stipulates to control sulfur at 350 ppm in diesel and 150 ppm in petrol. This is correct according to Euro II norms.
- **Option 2**: Claims to reduce sulfur levels to 50 ppm in petrol and diesel. This is incorrect.
- **Option 3**: Claims to reduce sulfur levels to 200 ppm in diesel and petrol. This is also incorrect.
- **Option 4**: Claims to reduce sulfur at 200 ppm in diesel and 100 ppm in petrol. This is incorrect as well.

6. **Conclusion**: The correct statement regarding Euro II norms is **Option 1**, which accurately reflects the sulfur control levels set by these norms.