$A$ compound $(M_2O_2)$ of group $I$ element $(M)$ hydrolyses to form $M^{+}$,$OH^{-}$ and $X$. Another compound $(M'O_2)$ of group $I$ element $(M')$ hydrolyses to form $(M')^{+}$,$OH^{-}$,$X$ and $Y$. What are $X$ and $Y$ respectively?

  • A
    $H_2O_2, O_2$
  • B
    $O_2, H_2$
  • C
    $H_2O_2, O_3$
  • D
    $H_2, H_2O_2$

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