This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'Regarding paicle interaction true is \nSelect and explain. \nA. Bragg peak observed with light mass electrons, B. Bremsstrahlung photons produced by a paicles, C. Electron scatter less than protons, D. Electrons stop sooner in low atomic number (than higher Z) materials', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Electrons stop sooner in low atomic number (than higher Z) materials', 'role': 'assistant'}]