The first ionization energy of neon is $2080.7\mathrm{KJ}/$ mole. The first of ionization energy of helium may be

• In the noble gases group, going down the group the ionization energy decreases. The ionization energy of helium is greater than that of neon. 

We know, the I.E of neon $=2080.7\mathrm{KJ}/$ mole. From the given option the I.E of helium $=$ $2372.3\mathrm{KJ}/$ mole (because the I.E of helium is more than neon and from the given options, $2372.3\mathrm{Kj}/\mathrm{mol}$ value is $>2080.7\mathrm{Kj}/\mathrm{mol}$ ).