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: Dental
[{'content': 'The ratio of rates of occurrence is \nSelect and explain. \nA. Attributable risk, B. Relative risk., C. Occurring risk, D. Distribution risk.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]