Radiation is the energy that contains electric and magnetic fields. They are the particles or the waves that are emitted from the atom. Thus, option B is correct.
Radiations are the energy or the waves transmitted in a medium or space due to the excitement of the atomic electronic transition. They are caused due to emission and removal of the electron from the atom's inner shell.
They are used in various fields of science including health and medicine where they are used to treat cancerous and tumor cells by killing the abnormal cells or slowing their growth.
Also, they are harmful as they act as mutagens that can alter the genetic material of the organism and can posses a dangerous threat to health.
Therefore, radiations are the waves emitted from atoms.
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