What transition in `He^(o+)` ion shall have the same wave number as the first line in Balmer series of H atom ?

What transition in He^(+) ion shall have the same wave number as the first line in Balmer series of hydrogen atom?

The transiton in He^(+) ion that will have the same wave number as the first line of lyman series of hydrogen will be

The transiton in He^(+) ion that will have the same wave number as the first line of lyman series of hydrogen will be

The wave number of the first line in the balmer series of Be^(3+) ?

The wave number of the first line in the balmer series of Be^(3+) ?

The wave number of limiting line in Balmer series of hydrogen atoms is

The wave number of the H_(a)- line in Balmer series of hydrogen spectrum is

If the wave number of 1^(st) line of Balmer series of H-atom is 'x' then :