Three energy levels for an atom are shown in the diagram.

Energy change Ea E_a\,Ea leads to the emission of a photon of wavelength λa\lambda_aλa. Energy change Eb E_b\,Eb leads to the emission of a photon of wavelength λb\lambda_bλb.
What is the ratio λaλb\displaystyle \frac{\lambda_a}{\lambda_b}λbλa?
0.400.400.40
1.61.61.6
2.52.52.5
4.14.14.1