If the molecular weights of $Na_2S_2O_3$ and $I_2$ are $M_1$ and $M_2$ respectively, then what will be the equivalent weights of $Na_2S_2O_3$ and $I_2$ in the following reaction?
$2S_2O_3^{2-} + I_2 \longrightarrow S_4O_6^{2-} + 2I^-$

  • A
    $M_1, M_2$
  • B
    $M_1, M_2 / 2$
  • C
    $2M_1, M_2$
  • D
    $M_1, 2M_2$

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