Hydrogen atom absorbs radiations of wavelength λ0 and consequently emit radiations of 6 different wavelengths, of which two wavelengths are longer than λ0 . Choose the correct alternative(s).
a. The final excited state of the atoms is n=4
b. The initial state of the atoms is n=2
c. The initial state of the atoms is n=3
d. There are three transitions belonging to Lyman series