A 2.0x10^14HZ photon is emitted from an excited atom .Which of the following is not a possible set of energy levels for the atom?

Selina Wink

A. --0.87eV :--1.07eV:--2.46eV
B.--0.91ev --1.50ev --2.33ev
c.--0,99 ev --1.67 ev --2.50ev
D--1.03 ev --1,86 ev --2.85ev
the answer is A
but i do not know how it is come

a

Hashen Roshika