Which one of the following pair of atoms/atom-ion have identical ground state configuration? (A)...

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Which one of the following pair of atoms/atom-ion have identical ground state configuration?
(A) \( \mathrm{Li}^{+} \)and \( \mathrm{He}^{+} \)
(B) \( \mathrm{Cl}^{-} \)and \( \mathrm{Ar} \)
(C) \( \mathrm{Na}^{+} \)and \( \mathrm{K}^{+} \)
(D) \( \mathrm{F}^{+} \)and \( \mathrm{Ne} \)
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