Burning of fossil fuels is the main source of which of the following pollutants?

Options

A. Nitrogen oxide
B. nitric acid
C. nitrous oxide
D. sulphur dioxide

Answer

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which pollutant is primarily released from the burning of fossil fuels.

2. **Identify the Options**: The options provided are:
- A) Nitrogen oxide
- B) Nitric acid
- C) Nitrous oxide
- D) Sulphur dioxide

3. **Analyze Each Option**:
- **Nitrogen Oxide**: While nitrogen oxides can be produced from combustion processes, they are not the main pollutant from fossil fuels.
- **Nitric Acid**: This is a product formed from nitrogen oxides and is not directly emitted from burning fossil fuels.
- **Nitrous Oxide**: This gas is produced from agricultural and industrial activities, as well as during combustion, but it is not the primary pollutant from fossil fuel combustion.
- **Sulphur Dioxide**: This gas is a direct result of burning fossil fuels, particularly coal and oil, which contain sulfur.

4. **Conclusion**: Based on the analysis, the main pollutant released from the burning of fossil fuels is **Sulphur Dioxide (SO2)**.

5. **Final Answer**: The correct answer is **D) Sulphur Dioxide**.