Figure shows the energy levels P, Q, R, S and G of an atom where G is the ground state. A red line in the emission spectrum of the atom can be obtained by an energy level change from Q to S. A blue line can be obtained by following energy level change

R to G

If E is the energy radiated in transition then $E_{R → G}>E_{Q → S}>E_{R → S}>E_{Q → R}>E_{P → Q}$

For getting blue line energy radiated should be maximum $\left(E \propto \frac{1}{\lambda}\right)$. Hence (d) is the correct option.