Fluorine is more electronegative than nitrogen. The best explanation is that

How many of the following radius orders are incorrect?

(a) ${\mathrm{N}}^{3-}>{\mathrm{P}}^{3-}$
(b) ${\mathrm{O}}^{2-}>{\mathrm{F}}^{-}$
(c) ${\mathrm{Ca}}^{2+}>{\mathrm{Sr}}^{2+}$
(d) ${\mathrm{S}}^{-}>{\mathrm{S}}^{2-}$
(e) ${\mathrm{S}}^{2-}>{\mathrm{O}}^{-}$

Report atomic number of the element having the largest size among the following:

$\mathrm{Ni}, \mathrm{Cu}, \mathrm{Zn}$