What transition of Li - spectrum will have same wavelength as that of second line of Balmer series of He spectrum?

What transition of Li - spectrum will have same wavelength as that of

1.	What transition of Li - spectrum will have same wavelength as that of second line of Balmer series of He spectrum?
Answer» THEREFORE, the TRANSITION from n=3ton=6 in Li+2 N will have the same wavelength of the second line of Balmer SERIES of He+ SPECTRUM.