Answer : The correct option is, gamma rays only
Explanation :
Penetration power : It is defined as the movement of particles or rays through an object. As more the energy of a particle, more will be the penetrating power.
The increasing order of the penetration power of alpha rays, beta rays, and gamma rays will be,
Alpha rays < Beta rays < Gamma rays
The penetrating power of the given rays varies greatly.
The alpha particles can be restricted by a few pieces of paper.
The beta particles can be pass through the paper but can not pass by the aluminum foil.
The blocking of gamma rays are the most difficult. It can be blocked by concrete, lead, or other heavy shielding.
Hence, the radiation can pass through the sheet of metal and hit the target is, gamma rays only
