In which of the following pair, both the species are isoelectronic but the first one is large in size than the second?

Options

A. `S^(2-) , O^(2-)`
B. `Cr, S^(2-)`
C. `F^(-), Na^(+)`
D. `N^(3-) , p^(3-)`

Answer

C

Explanation

In isoelectronic species (same `e^(-)` ), as Z increases, size decreases