This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fundamentals In Radiology, Subject name: Radiology
[{'content': 'About Bragg peak effect of protons all are true, except: \nSelect and explain. \nA. Electromagnetic radiation, B. Produce ionization in biological system, C. The dose of single beam is 2-4 times greater than the path dose, D. Beam therapy for AV malformation of the brain.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. Electromagnetic radiationThe brag peak is a pronounced peak on the Bragg curve which plots the energy loss of ionizing radiation during its travel through matter.For proton, a-rays, and other ion rays, the peak occurs immediately before the particle come to rest.', 'role': 'assistant'}]