Which one of the following sets of ions represents the collection of isoelectronic species?
- A$K^{+}, Cl^{-}, Mg^{2+}, Sc^{3+}$
- B$Na^{+}, Ca^{2+}, Sc^{3+}, F^{-}$
- C$K^{+}, Ca^{2+}, Sc^{3+}, Cl^{-}$
- D$Na^{+}, Mg^{2+}, Al^{3+}, Cl^{-}$
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