Find the successive elements of the periodic table with ionisation energies, 2372, 520 and 890 kJ per mol respectively

Q. Find the successive elements of the periodic table with ionisation energies, 2372, 520 and 890 kJ per mol respectively

A.            Li, Be, B

B.            H, He, Li

C.            B, C, N

D.            He, Li, Be

Answer: He, Li, Be