Which of the following statements about the reaction given below are correct?
MnO2 + 4HCI → MnCl2 +2H2O + Cl2
(i) HCl is oxidized to Cl2
(ii) MnO2 is reduced to MnCl2
(iii) MnCl2 acts as an oxidizing agent
(iv) HCl acts as an oxidizing agent
(a) (i), (iii) and (iv)
(b) (i), (ii) and (iii)
(c) (i) and (ii) only
(d) (iii) and (iv) only