Which transition in `Li^(2 +)` would have the same wavelength as the `2 rarr 4` transition in `He^(+)` ion ?

What transition in the hydrogen spectron would have the same wavelength as the Balmer transition n = 4 to n = 2 of He^(Theta) spectrum ?

What transition in the hydrogen spectrum would have the same wavelength as the Balmer transition, n = 4 to n = 2 of He+ spectrum?

What transition in the hydrogen spetrum would have the same wavelength as the balmer transition n = 4 to He^(o+) spectrum ?

What transition in the hydrogen spetrum would have the same wavelength as the balmer transition n = 4 to n=2 of He^(o+) spectrum ?

What transition in the hydrogen spectrum would have the same wavelength as the Balmer transition n=4 to n=2 of He^(+) spectrum ?