Choose the correct option from the following transitions in which the wavelength will be minimum

n = 2 to n = 1 n = 3 to n = 2 n = 4 to n = 3 n = 5 to n = 4

n = 2 to n = 1

Energy difference between consecutive transition decreases as the orbital number increases. Energy difference is maximum when transition is between n= 2 to n=1. Wavelength will be minimum for this transition.