Wrought iron is

$(a)\;\text{Pig Iren} \\(b)\;\text{Pure with with 0.1 to 0.2% } \\(c)\;\text{Impure sulphide are of iron} \\ (d)\;\text{An alloy of steel }$

Wrought iron is Pure with with 0.1 to 0.2%
Hence b is the correct answer.