A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?

• A. The wavelength of X-ray photon is less than the wavelength of visible radiation photon.
• B. Both    the    photons    have    different energies.
• C. The  speeds  of  both  the  photons  in vacuum are different
• D. The   frequency   of   X-ray   photon   is higher  than  the  frequency  of  visible radiation photon.