This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'The ratio of the incidence of the disease among exposed and the incidence among non-exposed is called \nSelect and explain. \nA. Odds ratio, B. Relative risk, C. Attributable risk, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: "Relative risk" (RR) or risk ratio is defined as the ratio between the incidence of disease among exposed persons and incidence among the non exposed.Incidence among exposedIQ = --------------------------------------------- x 100Incidence among non-exposedThe case-control study cannot give relative risk but from the case-control study, we can derive odds ratio.', 'role': 'assistant'}]