To Explain the Line Emission Spectra of Hydrogen in the Visible

Multiple Choice

To explain the line emission spectra of hydrogen in the visible region, Balmer proposed the following formula $\frac{1}{\lambda}=\mathrm{R}\left(\frac{1}{2^{2}}-\frac{1}{n^{2}}\right)$ . According to this formula for what value of n would the energy of the emitted wavelength be the greatest?

A) 3
B) 4
C) 5
D) 6
E) 7