Correct Answer - Option 3 : Steel
Explanation:
All metals used in engineering work can be classified into two categories.
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Ferrous material: Ferrous metals are those in which chief constituent is iron, although other constituents like carbon, manganese, phosphorus and sulphur etc. Example steel and cast iron
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Non-ferrous metals are those which do not contain iron. Metals like copper, aluminium, lead, tin, etc and their alloys.
Steel is manufactured from iron ore. In the blast furnace, pig iron is produced by reducing iron ore. Thus, the raw material for iron and steel products is pig iron.
