Which of the following has lower ignition temperature?

Options

A. Wood
B. Paper
C. Vegetable oil
D. Kerosene oil

Explanation

To determine which of the given substances has the lowest ignition temperature, we need to follow these steps:

### Step-by-Step Solution:

1. **Understand Ignition Temperature**:
- Ignition temperature is defined as the minimum temperature at which a substance starts to burn. This means that if a substance reaches this temperature, it will ignite and continue to burn.

2. **List the Substances**:
- The substances given in the question are:
- Wood
- Paper
- Vegetable oil
- Kerosene oil

3. **Analyze the Flammability of Each Substance**:
- **Wood**: Generally has a higher ignition temperature because it needs to reach a certain temperature before it can catch fire.
- **Paper**: Has a relatively low ignition temperature, as it can catch fire easily when exposed to heat.
- **Vegetable Oil**: Has a moderate ignition temperature, higher than paper but lower than wood.
- **Kerosene Oil**: Known for being highly flammable, it has a low ignition temperature and can ignite easily.

4. **Compare the Ignition Temperatures**:
- Among the listed substances, kerosene oil is known to have the lowest ignition temperature due to its high flammability.

5. **Conclusion**:
- Therefore, the substance with the lowest ignition temperature among the options provided is **kerosene oil**.

### Final Answer:
- Kerosene oil has the lowest ignition temperature.