Sulphur oxides which are responsible for major air pollution are caused by

Options

A. burning of coal and refining of petroleum
B. burning of fuels in automobiles
C. combustion of fuels containing C and H
D. using indoor combustion devices like cooking gas.

Explanation

### Step-by-Step Solution:

1. **Understanding Sulphur Oxides**:
- Sulphur oxides, primarily sulphur dioxide (SO₂), are significant air pollutants that contribute to environmental issues like acid rain and respiratory problems.

2. **Source of Sulphur Oxides**:
- The main sources of sulphur oxides in the atmosphere are the combustion of fossil fuels. This includes the burning of coal and oil, which are rich in sulphur compounds.

3. **Formation Process**:
- When coal and oil are burned, the sulphur present in these fuels reacts with oxygen in the air to form sulphur dioxide (SO₂). This reaction can be summarized as:
\[ \text{S (from fuel) + O}_2 \rightarrow \text{SO}_2 \]

4. **Impact on Air Quality**:
- The release of sulphur dioxide into the atmosphere contributes significantly to air pollution, leading to health issues and environmental damage.

5. **Conclusion**:
- Therefore, the correct answer to the question is that sulphur oxides, which are responsible for major air pollution, are caused by the burning of coal and oil.

### Final Answer:
Sulphur oxides are caused by the burning of coal and oil.

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