Cobalt therapy is the medical use of ____________ rays from the radioisotope cobalt-60 to treat conditions such as cancer.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. gamma.
Cobalt therapy is the medical use of gamma rays from the radioisotope cobalt-60 to treat conditions such as cancer. Cobalt-60 was widely used in teletherapy machines, which produced a beam of gamma rays which was directed into the patient's body to kill tumor tissue.