This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'The following agents are known as leukemogens except \nSelect and explain. \nA. Benzene, B. Berylium, C. Ethylene oxide, D. Ionizing radiation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Leukemogen-a substance capable of inducing leukemia. Causation, induction and development. Berrylium is not a leukemogen. Risk is related to total cumulative dose and does intensity.', 'role': 'assistant'}]