radiation that only interacts with ions
a neutron that has accquired a charge, thus forming an ion
the same as a proton
high energy radiation that remove eletrons from atoms or molecules.
Ionizing radiation is any type of particle or electromagnetic wave that carries enough energy to ionize or remove electrons from an atom. There are two types of electromagnetic waves that can ionize atoms: X-rays and gamma-rays, and sometimes they have the same energy. Hence Option D is correct.