The group having isoelectronic species is :

Question

( A ) $ O^{-}, F^-, Na, Mg^{+}$
( B ) $ O^{-}, F^-, Na^+, Mg^{2+}$
( C ) $ O^{2-}, F^-, Na^+, Mg^{2+}$
( D ) $ O^{2-}, F^-, Na, Mg^{2+}$