Which of the following order of ionisation energy is correct?

Ionisation energy generally increase in a period from left to right. But due to comparatively stabler configuration of Be $\left(1 s^2, 2 s^2\right)$, it has more ionisation energy than Boron \left(1 s^2, 2 s^2, 2 p^1\right)$. Hence, the correct order is :$\mathrm{B} \lt \mathrm{Be} \lt \mathrm{C} \lt \mathrm{N}