The oxidation state of sulfur in the anions $SO_3^{2-}$,$S_2O_4^{2-}$,and $S_2O_6^{2-}$ increases in the order:

  • A
    $S_2O_6^{2-} < S_2O_4^{2-} < SO_3^{2-}$
  • B
    $SO_3^{2-} < S_2O_4^{2-} < S_2O_6^{2-}$
  • C
    $S_2O_4^{2-} < SO_3^{2-} < S_2O_6^{2-}$
  • D
    $S_2O_4^{2-} < S_2O_6^{2-} < SO_3^{2-}$

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