X-rays of wavelength of 0.0650 nm undergo Compton scattering from free electrons in carbon. In photons are scatted at 90° relative to the incident rays, what percentage of initial X-ray photon energy is transferred to an electron in such a scattering? (h = 6.63 × 10-34 J s, me = 9.11 × 10-31 kg, c = 3 × 108 m/s)

• A. 3.6%
• B. 2.4%
• C. 1.2%
• D. 4.6%