Pig iron or cast iron contains

0.25% to 2.5% carbon

3.5% to 4.5% carbon

0.12% to 0.25% carbon

none of the above

Wrought iron, Cast iron and Pig iron are the different forms of iron
Wrought iron is the purest one. it contains 0.12 to 0.25 % carbon and is thus the purest form of iron
Pig iron is used as a raw material for iron steel making

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