10. what type of radiation particles were the most biologically dangerous?\na. alpha\nb. beta\nc. gamma\nd…

Brief Explanations:

Gamma radiation has high - energy photons that can penetrate deeply into the body and cause significant damage to cells and DNA. Alpha particles can be stopped easily by skin or paper but are dangerous if ingested or inhaled. Beta particles can penetrate skin to some extent but are less penetrating than gamma. There is no "delta" radiation in common radioactive decay.

Answer:

c. gamma