In a hydrogen atom, which of the following electronic transitions would involve the maximum energy change

From n = 2 to n = 1 From n = 3 to n = 1 From n = 4 to n = 2 From n = 3 to n = 2

From n = 3 to n = 1

From diagram $E_1=-13.6-(-3.4)=-10.2 eV$ $E_2=-13.6-(-1.51)=-12.09 eV$ $E_3=-1.51-(-0.85)=-0.66 eV$ $E_4=-3.4-(-1.51)=-1.89 eV$ $E_3$ is least i.e. frequency is lowest.