Which of the following has the highest electron gain enthalpy
(A) $\left[\mathrm{Ne}\right]3{\mathrm{s}}^{2}3{\mathrm{p}}^3$

(B)  $\left[\mathrm{Ne}\right]3{\mathrm{s}}^{2}3{\mathrm{p}}^4$

(C)  $\left[\mathrm{Ne}\right]3{\mathrm{s}}^{2}3{\mathrm{p}}^5$

(D) $\left[\mathrm{Ne}\right]3{\mathrm{s}}^{2}3{\mathrm{p}}^2$