Which of the following pairs of ions have the same electronic configuration?

  • A
    $Li^{+}$ and $Na^{+}$
  • B
    $Na^{+}$ and $K^{+}$
  • C
    $K^{+}$ and $Ca^{2+}$
  • D
    $O^{2-}$ and $Cl^{-}$

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