The molten iron has 4% carbon and other impurities like manganese, silicon, phosphorus, etc. This is called:

Wrought iron

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Pig iron

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Cast iron

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Raw iron

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Solution

The correct option is B Pig iron
The molten iron has 4% carbon and other impurities like manganese, silicon, phosphorus, etc. This is called pig iron.
Cast iron contains nearly 3% of carbon.
Wrought iron is the purest form of iron which contain 0.2-0.5% of carbon and traces of phosphorus and silicon.

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