H-spectrum

Which of the following links lines of the H-atom spectrum belongs to the Balmer series ?

The first emission line in the H-atom spectrum in the Balmer series appears at:

Which transition in the hydrogen spectrum have the same wavelength as Balmer transition, n = 4 to n = 2 , of H2^+ spectrum ?

Bohr's Model(spectrum of H like species)

Calculate the wave number and wave length of H_(alpha) line in Brackett series of H-emission spectrum

In Balmer series of H atom spectrum, which electronic transitions represents 3^(rd) line?

What will be the value of the longest wavelength line in Balmer's spectrum for H atom?

Charateristic X-rays are not obtained in the spectrum of H-atom bacause-

Total different spectral lines observed in between 11th excited state and 3rd energy level in H-atom emission spectrum are: