Which of the following has lowest percentage of carbon?

Options

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

Answer

To determine which of the given options has the lowest percentage of carbon, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- Option 1: Pig Iron
- Option 2: Cast Iron
- Option 3: Wrought Iron
- Option 4: Hematite

2. **Analyze Pig Iron**:
- Pig iron is known to be the most impure form of iron.
- It typically contains around **5% carbon**.

3. **Analyze Cast Iron**:
- Cast iron is another form of iron that is more refined than pig iron.
- It generally contains around **4% carbon**.

4. **Analyze Wrought Iron**:
- Wrought iron is a much purer form of iron compared to both pig iron and cast iron.
- It contains a very low percentage of carbon, approximately **0.12% to 0.15%**.

5. **Analyze Hematite**:
- Hematite is an iron ore and does not contain carbon in its composition.
- While it is primarily composed of iron oxide (Fe2O3), it is not a form of iron that contains carbon.

6. **Comparison of Carbon Percentages**:
- Pig Iron: 5% carbon
- Cast Iron: 4% carbon
- Wrought Iron: 0.12% to 0.15% carbon
- Hematite: 0% carbon (as it is an ore)

7. **Conclusion**:
- Among the options, **Wrought Iron** has the lowest percentage of carbon, with values ranging from 0.12% to 0.15%. Hematite has no carbon, but since it is not a form of iron, the correct answer in the context of iron forms is Wrought Iron.

### Final Answer:
The option with the lowest percentage of carbon is **Wrought Iron** (Option 3).