Which of the following should be the possible subshells for $\mathrm{n}+\mathrm{l}=7$?

The first emission line of the Balmer series in ${\mathrm{He}}^{+}$ spectrum has the wave number in ${\mathrm{cm}}^{-1}$ equal to:

($\mathrm{R}$ is the Rydberg's constant)