Which of the following are isoelectronic species?
- A$O^{2-}, F^{-}, Na^{+}, Mg^{+}$
- B$O, F^{-}, Na, Mg$
- C$O^{2-}, F^{-}, Na^{+}, Mg^{2+}$
- D$O^{2-}, Cl^{-}, Na, Mg^{2+}$
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