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 between incidence among exposed and nonexposed persons is called- \nSelect and explain. \nA. Attributable risk, B. Positive predictive value, C. Relative risk, D. Odds ratio', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .relative risk also called as risk ratio ,is the ratio of the incidence of the disease or death among exposed and incidence among non exposed.it is a direst measure of strength of association between suspected cause and effect.RR of one indicates no association,it must also be noted that risk does not necessarily imply causal association ref:park&;s textbook,ed22,pg no 75', 'role': 'assistant'}]