Radiations are the form of waves. The radiation which is the smallest in size is gamma radiation. The correct option is C.
The emission or transfer of energy in the form of waves or particles through space or a material medium.
Alpha radiation is the named for the emission of an alpha particle i.e. helium nuclei, beta radiation is the emission of electrons, gamma radiation is the emission of photons and positron radiation is the emission of positrons.
The gamma radiation is the smallest in size in all of the type of radiations with the high ionizing power.
Thus, the radiation which is the smallest in size is gamma radiation. The correct option is C.
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