Which is true regarding the penetrating power of radiation?

Alpha is the most penetrating

beta is less penetrating than alpha

alpha is more penetrating than gamma

gamma is more penetrating than beta

Gamma radiation have the most penetrating power. It can penetrate through human body, aluminum and other metals. It can be stopped by lead. Hence, the radioactive waste are stored in lead container for safety purposes. The beta ray has more penetrating power than the alpha but less than gamma. The beta radiations can be stopped by aluminum. The alpha radiations have least penetrating power and it can be stopped by human hands.