Which type of radiation is classified as electromagnetic?

Electromagnetic radiation is characterized by the oscillation of electric and magnetic fields and includes various forms such as gamma rays, ultraviolet light, visible light, and X-rays. X-rays specifically fall under this category due to their ability to propagate through space without a medium and their wave-like behavior.

Unlike alpha and beta radiation, which consist of particles (alpha particles made of helium nuclei and beta particles which are electrons or positrons), X-rays are purely electromagnetic waves. Neutrons are also particles, specifically found in the nucleus of an atom, further distinguishing them from electromagnetic radiation.

Thus, X-rays are the correct answer as they represent a form of electromagnetic radiation, crucial in medical imaging and treatment, leveraging their unique properties for diagnostics and therapies.