Hydrogen peroxide converts manganese $(II)$ hydroxide rapidly into ' . . . . . . ' in alkaline medium. Which of the following compounds is suitable for filling in the blank?

  • A
    $MnO(OH)_2$
  • B
    $Mn_3O_4$
  • C
    $Mn_2O_7$
  • D
    $MnO_3$

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