The Wavelength of X Rays Is Shorter Than the Wavelength

The wavelength of X rays is shorter than the wavelength of infrared rays.Which of the following is true?

A) X rays have more energy per unit than infrared rays have.
B) X rays have a smaller value for Planck's constant than infrared waves have.
C) X rays have a different absorption spectrum than infrared waves have.
D) X rays and infrared waves have the same frequency.
E) Infrared waves are in the ground state,whereas X rays are in the excited state.