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': 'In case control study, the risk is calculated by? \nSelect and explain. \nA. Relative risk, B. Attributable risk, C. Cross product ratio, D. None', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Cross product ratio o Risk in case control study is calculated by odds ratio (cross product ratio).", 'role': 'assistant'}]