Assertion : Wrought iron is more malleable and ductile than steel.
Reason : It contains slightly less percentage of carbon.

Options

A. If both assetion and reason are CORRECT, and reason is the CORRECT explanation of the assertion
B. If both assertion and reason are CORRECT, but reason is NOT the CORRECT explanation of the assertion
C. If assertion is CORRECT but reason is INCORRECT
D. If assertion is INCORRECT but reason is CORRECT

Answer

To solve the question, we need to analyze the assertion and reason provided:

**Assertion:** Wrought iron is more malleable and ductile than steel.
**Reason:** It contains slightly less percentage of carbon.

### Step-by-Step Solution:

1. **Understanding Wrought Iron:**
- Wrought iron is a type of iron that contains about 1% carbon.
- It is known for its malleability and ductility, meaning it can be easily shaped and stretched without breaking.

2. **Understanding Steel:**
- Steel is an alloy of iron that typically contains between 1% to 1.5% carbon.
- The presence of carbon in steel makes it harder and stronger than wrought iron, but it also makes it less malleable and ductile.

3. **Comparing Malleability and Ductility:**
- Malleability refers to the ability of a material to deform under compressive stress, while ductility refers to the ability to deform under tensile stress.
- Since wrought iron has a lower carbon content compared to steel, it retains more of its malleable and ductile properties.

4. **Evaluating the Assertion:**
- The assertion states that wrought iron is more malleable and ductile than steel. This is true based on the properties of both materials.

5. **Evaluating the Reason:**
- The reason given is that wrought iron contains slightly less percentage of carbon. This is also true, as wrought iron has about 1% carbon while steel has 1% to 1.5% carbon.
- The reason correctly explains why wrought iron is more malleable and ductile than steel.

6. **Conclusion:**
- Both the assertion and the reason are correct, and the reason provides a correct explanation for the assertion.

### Final Answer:
- The correct option is **Option 1:** Both assertion and reason are correct, and the reason is the correct explanation of the assertion.