A Certain Photon After Being Scattered from a Free Electron

Multiple Choice

A certain photon after being scattered from a free electron at rest moves at an angle of 120° with respect to the incident direction. If the wavelength of the incident photon is 0.591 nm, what is the wavelength of the scattered photon?

A) 0.380 nm
B) 0 nm
C) 0.550 nm
D) 0.591 nm
E) 0.595 nm