The electronic configuration of valence shell of four elements A, B, C and D are?

(A) $n{s}^2,n{p}^2$

(B) $n{s}^2,n{p}^3$

(C) $n{s}^2,n{p}^4$

(D) $n{s}^2,n{p}^5$

Arrange them in increasing order of ${\mathrm{IE}}_2$

Carbon group, noble gas, Chalcogens, halogen has the $n{s}^{2}n{p}^2$, $n{s}^{2}n{p}^3$, $n{s}^{2}n{p}^4$, $n{s}^{2}n{p}^5$.

The increasing order of the ionization energy according to the family of element is, Carbon group<noble gas<halogen<Chalcogens

Hence, the electronic configuration of valence shell of four elements A, B, C and D are A < B < D < C.