The chemical reaction involved in the corrosion of iron metal is that of: (a) Oxidation as well as displacement (b) Reduction as well as combination (c) Oxidation as well as combination Reduction as well as displacement

Option (c) is the answer.

Corrosion takes place when iron metal reacts with water and oxygen and form hydrated oxide and is an oxidation reaction as it is adding up of oxygen

Iron metal combines with water and oxygen to corrode thus it is a combination reaction which further forms a single compound.