Acidized $KMnO_4$ solution does not oxidise:

  • A
    $C_2O_4^{2-} \ (aq.)$
  • B
    $NO_2^{-} \ (aq.)$
  • C
    $S^{2-} \ (aq.)$
  • D
    $F^{-} \ (aq.)$

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