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': 'Attributable risk is defined as - \nSelect and explain. \nA. Incidence of disease among exposed minus incidence of disease among non-exposed, B. Incidence of disease among non-exposed minus incidence of disease among exposed, C. Incidence of disease among non-exposed divided by incidence among exposed, D. Incidence of disease among exposed divided by incidence among non-exposed', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Incidence of disease among exposed minus incidence of disease among non-exposed * Attributable risk is the difference in incidence rates of disease (or death) between an exposed group and non- exposed group.AR =Incidence of disease in exposed - Incidence of disease in unexposed----------------------------------------------------------Incidence of disease in exposedx 100", 'role': 'assistant'}]