Electronic configuration of four elements $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and D are given below :
(A) $1 s^{2} 2 s^{2} 2 p^{3}$
(B) $1 s^{2} 2 s^{2} 2 p^{4}$
(C) $1 s^{2} 2 s^{2} 2 p^{5}$
(D) $1 s^{2} 2 s^{2} 2 p^{2}$
Which of the following is the correct order of increasing electronegativity (Pauling's scale) ?