B.P.S.C. C.D.P.O. (Pre) 2018
The purest form of iron is
asteel
bpig iron
ccast iron
dwrought iron✓ Correct
eNone of the above/More than one of the above
Explanation
The purest form of iron is wrought iron. Iron is the first element of the eighth group in the periodic table. Compared to pig iron, it is an alloy of iron with very low carbon content. Pig iron is also another form of iron, but it contains silicon, manganese, and traces of other elements; its carbon content is about 2–4%.
general-geography