Periodic Table And Periodicity

The statement(s) that are correct about the species \(\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}\) and \(\mathrm{Mg}^{2+}\).

(A) All are isoelectronic

(B) All have the same nuclear charge

(C) \(\mathrm{O}^{2-}\) has the largest ionic radii

(D) \(\mathrm{Mg}^{2+}\) has the smallest ionic radii

Choose the most appropriate answer from the options given below :