Consider the following statements about the application of electro chemical series.
I. Comparison of relative oxidising and reducing powers of substances.
Il. Prediction of evolution of hydrogen during reaction of a metal with acid.
III. Prediction of spontaneity of a redox reaction.
IV. Calculation of amount of metal deposited at cathode.
    The true statement(s) is/are

• A

  I and II only

• B

  I, II and III

• C

  IV only

• D

  II, III and IV