The pair that contains two $P-H$ bonds in each of the oxoacids is

  • A
    $H_4P_2O_5$ and $H_4P_2O_6$
  • B
    $H_3PO_2$ and $H_4P_2O_5$
  • C
    $H_3PO_3$ and $H_3PO_2$
  • D
    $H_4P_2O_5$ and $H_3PO_3$

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