From the table, we can see that; 1 = beta; 2 = alpha, 3 = gamma. Option A
Radiation is a form of energy that can not be seen. We know that beta radiation can be stopped by such things as a piece of cloth while alpha particles can be stopped by an aluminums foil. Also, gamma rays can only be stopped by thick concrete or lead.
Hence; we can conclude that; 1 = beta; 2 = alpha, 3 = gamma. Option A.
Learn more about radiation:https://brainly.com/question/23208471
#SPJ1