This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Social & Preventive Medicine
[{'content': 'Population attributable risk is defined as the difference between: \nSelect and explain. \nA. Incidence in exposed and incidence in non-exposed compared with incidence in non-exposed, B. Incidence in population and incidence in exposed compared with incidence in population, C. Incidence in population and incidence in non-exposed compared with incidence in population, D. Incidence in population and incidence in exposed compared with incidence in non-exposed', 'role': 'user'}, {'content': 'Answer: C \nExplanation: population attributable risk is defined as the difference between incidence in population and incidence in non-exposed compared with incidence in population Ref: Park 24th edition', 'role': 'assistant'}]