$A \xrightarrow{4 KOH, O_2} 2 B (Green) + 2 H_2O$
$3 B \xrightarrow{4 HCl} 2 C (Purple) + MnO_2 + 2 H_2O$
$3 C \xrightarrow{H_2O, KI} 2 A + 2 KOH + D$
In the above sequence of reactions,$A$ and $D$,respectively,are:

  • A
    $KI$ and $KMnO_4$
  • B
    $MnO_2$ and $KIO_3$
  • C
    $KIO_3$ and $MnO_2$
  • D
    $KI$ and $K_2MnO_4$

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