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': 'Incidence rate of lung cancer among smokers is 8 per 1000 and among non-smokers is 1 per 1000. Population attributable risk is - \nSelect and explain. \nA. 89%, B. 95%, C. 10%, D. 100%', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 89% Population attributable risk (PAR) o It is the incidence of disease (or death) in the total population minus the incidence of disease (or death) among those who are not exposed.", 'role': 'assistant'}]