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': '"Risk ratio" is utilized to calculate the- \nSelect and explain. \nA. Relative risk, B. Attribute risk, C. Population controlled trial, D. Odds ratio', 'role': 'user'}, {'content': "Answer: A \nExplanation: Relative risk is the ratio of the incidence among exposed and the incidence among non exposed. In the example, RR of lung cancer = 10/1 = 10 Some authors use the term risk ratio to refer to relative risk. The larger the relative risk the greater the strength of association between the suspected factor and disease Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 86", 'role': 'assistant'}]