Identify the correct statement from the following

Options

A. Wrought iron is impure iron with 4% carbon
B. Blister copper has blistered appearance due to evolution of `CO_2`Vapour phase refining is carried out for Nickel by Van Arkel method
C. Vapour phase refining is carried out for Nickel by Van Arkel method
D. Pig iron can be moulded into a variety of shapes

Explanation

To identify the correct statement from the provided options, we will analyze each statement one by one based on the information given in the video transcript.

### Step-by-Step Solution:

1. **Statement Analysis: Raw Tyrant is impure tyrant with 4% carbon.**
- The video states that this is false. Raw titanium (tyrant) is actually the purest form and contains very little carbon. Therefore, this statement is incorrect.

2. **Statement Analysis: Blistered copper has a blistered appearance due to the evolution of CO2.**
- According to the video, this statement is also false. Blistered copper appears blistered due to the evolution of SO2 (sulfur dioxide), not CO2 (carbon dioxide). Hence, this statement is incorrect.

3. **Statement Analysis: Biberpiz refining is carried out for nickel by one arkyl method.**
- The video indicates that this statement is false as well. Biberpiz refining is actually used to obtain ultra-pure titanium, not nickel. Therefore, this statement is incorrect.

4. **Statement Analysis: Pig iron can be molten into a variety of shapes.**
- The video confirms that this statement is true. Pig iron is easily available and contains a smaller amount of impurities such as sulfur, phosphorus, silicon, and magnesium. With about 4% carbon, it can indeed be molded into various shapes. Thus, this statement is correct.

### Conclusion:
The correct statement is: **Pig iron can be molten into a variety of shapes.**

---