what form does the radiation that is used to treat cancer take?\no alpha particles\no photons\no beta…

Brief Explanations:

In cancer - treatment, photons (in the form of X - rays or gamma rays) are commonly used radiation. Alpha particles have low penetration and are not typically used for external cancer treatment. Beta particles also have limited penetration. Neutrons are less commonly used compared to photons for routine cancer treatment.

Answer:

B. photons