Of the Three Species, Which Would Be Isoelectronic with O

Of the three species, which would be isoelectronic with O?
I. N⁺
II. F ^-
III. Ne^{2 -}

A) I and II are isoelectronic, III is not isoelectronic with O
B) only I is isoelectronic with O
C) only II is isoelectronic with O
D) all are isoelectronic with O
E) none are isoelectronic with O