Which one of the following groups represent a collection of isolectronic species ? (At.no `Cs = 55, Br = 35)`

Options

A. `N^(3-),F^(-),Na^(+)`
B. `Be, AI^(3+), CI^(-)`
C. `Ca^(2+),Cs^(+),Br`
D. `Na^(+),Ca^(2+),Mg^(2+)`

Answer

A

Explanation

[Isolectronic species = Total no. of electrons are same]