In which of the following is the difference in the oxidation numbers of the underlined elements the greatest?

  • A
    $\underline{N}O_2$ and $\underline{N}_2H_4$
  • B
    $\underline{S}O_3^{2-}$ and $\underline{S}O_4^{2-}$
  • C
    $\underline{S}^{2-}$ and $\underline{S}O_3^{2-}$
  • D
    $\underline{S}^{2-}$ and $\underline{S}O_4^{2-}$

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