Q.

The radiation that can penetrate deepest in our body –

A. UV-radiation
B. Alpha-particles
C. a-particles
D. Gamma-particles
Answer» D. Gamma-particles
Explanation: The ability of radioactivity to pass through materials is called its penetrating ability. Penetrating ability depends on the size of the radioactive particle. Alpha particles are the biggest, beta particles are very much smaller and gamma rays have no mass.
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