How is cas iron different from pig iron ?

Options

A. Cast iron is pure iron while pig iron is imure
B. Cast iron has lower carbon content than pig iron. Cast iron is harder and has casting property
C. pig iron is extremetly hard while cast iron is soft and malleable
D. pig iron contains many impurities like S, P, Sietc., while cast iron is free from these impurities

Answer

B

Explanation

Pigiron contains 4% .C. and cast iron contains 3%