This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Analytical Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Incidence of disease among exposed divided that of non exposed is equal to - \nSelect and explain. \nA. Relative risk, B. Attributable risk, C. Odd ratio, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Relative risk RR =Incidence of disease among exposed----------------------------------Incidence of disease among nonexposed AR =Incidence of disease in exposed - Incidence of disease in unexposed--------------------------------------------------------Incidence of disease in exposedx 100", 'role': 'assistant'}]