An electron and a proton have the same velocity. Compare the wavelengths, phase, and group velocities of their de Broglie waves.

a) The wavelengths are different; phase and group velocities are the same.
b) The wavelengths, phase, and group velocities are the same.
c) The wavelengths and group velocities are the same; phase velocity is different.
d) The wavelengths, phase, and group velocities are different.