Which of the following air pollutants is produced from the incomplete burning of vehicle fuels?

Options

A. Carbon monoxide
B. Carbon dioxide
C. Sulphur trioxide
D. Sulphur dioxide

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks us to identify which air pollutant is produced from the incomplete burning of vehicle fuels.

2. **Identifying Vehicle Fuels**: Vehicle fuels primarily include petrol and diesel, both of which are derived from petroleum. These fuels are used in internal combustion engines.

3. **Understanding Incomplete Combustion**: Incomplete combustion occurs when there is not enough oxygen to allow the fuel to react completely. This can lead to the production of various pollutants.

4. **Identifying Common Air Pollutants**: The options provided are:
- Carbon monoxide (CO)
- Carbon dioxide (CO2)
- Sulphur dioxide (SO2)
- Sulphur trioxide (SO3)

5. **Analyzing the Pollutants**:
- **Carbon monoxide (CO)**: This is a colorless, odorless gas that is produced when carbon-containing fuels are burned incompletely. It is particularly dangerous because it can bind to hemoglobin in the blood more effectively than oxygen, reducing the blood's ability to carry oxygen.
- **Carbon dioxide (CO2)**: This is produced during complete combustion and is not a direct result of incomplete combustion.
- **Sulphur dioxide (SO2)**: This is produced from the burning of fossil fuels that contain sulfur, but it is not specifically related to incomplete combustion of vehicle fuels.
- **Sulphur trioxide (SO3)**: This is also related to the combustion of sulfur-containing fuels but is not produced from incomplete combustion.

6. **Conclusion**: Based on the analysis, the air pollutant that is produced from the incomplete burning of vehicle fuels is **carbon monoxide (CO)**.

### Final Answer:
The air pollutant produced from the incomplete burning of vehicle fuels is **carbon monoxide (CO)**.

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