Which of the following has the largest size?

The correct order of atomic radii of $B, Be, N$ and $C$ is

If four different elements $A, B, C$ and $D$ have electronic configurations as $A = [Ne] 3s^2 3p^4$,$B = [Ne] 3s^2 3p^5$,$C = [Ar] 3d^{10} 4s^2 4p^4$ and $D = [Ar] 3d^{10} 4s^2 4p^5$,identify the element with the largest atomic radius.

What is the increasing order of atomic radii for $O, C, F, Cl,$ and $Br$?

Which of the following ions has the smallest radius?

Which of the following elements shows an increase in atomic size?