What is the oxidation number of underlined species in $\underline{P}F_6^{-}$ and $\underline{V}_2 O_7^{4-}$ ions respectively?

  • A
    $+5$ and $-5$
  • B
    $+5$ and $+5$
  • C
    $-5$ and $+5$
  • D
    $+3$ and $+3$

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