Mark the variety of iron which has highest melting point

Options

A. Pig iron
B. Cast iron
C. Wrought iron
D. Steel

Answer

To determine which variety of iron has the highest melting point, we can analyze the given options: pick iron, cast iron, wrought iron, and steel.

### Step-by-Step Solution:

1. **Identify the Varieties of Iron**:
- The options provided are:
- Pick Iron
- Cast Iron
- Wrought Iron
- Steel

2. **Research Melting Points**:
- Each variety of iron has a different melting point:
- **Pick Iron**: Melting point is around 1425-1540 °C.
- **Cast Iron**: Melting point is approximately 1150-1300 °C.
- **Wrought Iron**: Melting point is around 1425-1470 °C.
- **Steel**: Melting point varies depending on the alloy but is generally around 1370-1500 °C.

3. **Compare the Melting Points**:
- From the melting points listed:
- Pick Iron: Up to 1540 °C
- Cast Iron: 1150-1300 °C
- Wrought Iron: 1425-1470 °C
- Steel: 1370-1500 °C

4. **Determine the Highest Melting Point**:
- Among these, **Pick Iron** has the highest melting point, reaching up to 1540 °C.

5. **Conclusion**:
- Therefore, the variety of iron with the highest melting point is **Pick Iron**.

### Final Answer:
The variety of iron which has the highest melting point is **Pick Iron**.