MnO4– oxidizes (i) oxalate ion in acidic medium at 333 K and and (ii) HCl. For balanced chemical equations, the ratios [MnO4– : C2O42–] in (i) and [MnO4– : HCl] in (ii), respectively, are-
(A) 1 : 5 and 2 : 5
(B) 2 : 5 and 1 : 8
(C) 2 : 5 and 1 : 5
(D) 5 : 2 and 1 : 8