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: Social & Preventive Medicine
[{'content': 'Ratio of incidence among exposed and non exposed is known as ? \nSelect and explain. \nA. Risk ratio, B. Odds ratio, C. Attributable risk, D. SAR', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Risk ratio Relative risk (risk ratio) Relative risk is the ratio of the incidence of the disease (or death) among exposed and the incidence among nonexposed.", 'role': 'assistant'}]