For the Balmer series in the spectrum of

For the Balmer series in the spectrum of $\mathrm{H}$

atom, $\quad \bar{v}=\mathrm{R}_{\mathrm{H}}\left\{\frac{1}{\mathrm{n}_{1}^{2}}-\frac{1}{\mathrm{n}_{2}^{2}}\right\}, \quad$ the correct

statements among (I) and (IV) are :

(I) As wavelength decreases, the lines in the series converge

(II) The integer $n_{1}$ is equal to 2

(III) The lines of longest wavelength corresponds to $\mathrm{n}_{2}=3$

(IV) The ionization energy of hydrogen can be calculated from wave number of these lines