Which of these is a solid fuel?

Options

A. Coal
B. LPG
C. Diesel
D. Kerosene

Answer

To determine which of the options is a solid fuel, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Fuel**:
- Fuel is a material that produces heat when it is burned.

2. **Identify the Options**:
- We need to analyze the given options to find out which one is a solid fuel.

3. **Evaluate Each Option**:
- **Option 1: Coal**:
- Coal is a solid material that is burned to produce heat. Therefore, it is classified as a solid fuel.
- **Option 2: LPG (Liquefied Petroleum Gas)**:
- LPG is a gas when stored under pressure and is classified as a gaseous fuel. This option is incorrect.
- **Option 3: Diesel**:
- Diesel is a liquid fuel used in engines and is not a solid. This option is incorrect.
- **Option 4: Kerosene**:
- Kerosene is also a liquid fuel commonly used for heating and cooking. This option is incorrect.

4. **Conclusion**:
- The only option that is a solid fuel is **Option 1: Coal**.

### Final Answer:
The solid fuel among the options is **Coal**.