I. Rusting of iron is an example of corrosion but tarnishing of sodium metal is not.
II. Covering the surface with bis - phenol protect iron from rusting.
III. Sn and Zn are used to protect iron from rusting.
    True statements are

• A

  I and II

• B

  I and III

• C

  II and III

• D

  I, II and III