which type of radiation is the smallest in size?\no alpha radiation\no beta radiation\no gamma radiation\no…

Brief Explanations:

Alpha radiation consists of helium - 4 nuclei. Beta radiation is made of electrons or positrons. Gamma radiation is electromagnetic radiation, which has no mass or charge and is just a high - energy photon. Positron radiation is similar to beta radiation with a positive charge. Photons of gamma radiation have no rest mass and are the smallest in size among these types of radiation.

Answer:

C. gamma radiation