In the neutral or faintly alkaline medium, `` KMnO _{4} `` oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from
(A) `` +6 `` to `` +5 ``

(B) `` +7 `` to `` +4 ``
(C) `` +6 `` to `` +4 ``
(D) `` +7 `` to `` +3 ``