Define the oxidation states of $Mn$ in the products of the given reaction:
$3K_2MnO_4 + 2H_2O + 4CO_2 \rightarrow 2KMnO_4 + MnO_2 + 4KHCO_3$

  • A
    $+7, +4$
  • B
    $+6, +3$
  • C
    $+7, +2$
  • D
    $+5, +5$

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