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 a case controlled study. It is found that the disease is more common in the group taking coffee as compared to the control group. The significance of this is - \nSelect and explain. \nA. Cause and effect relationship established, B. Disease median can be calculated, C. Caffeine is associated with occurrence of disease, D. Controls will not get the disease', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Caffeine is associated with occurrence of disease Case-control study does not establish the cause and effect relationship because it can not distinguish between cause and associated factors. o Case-control study can only tell the association between cause and effect.", 'role': 'assistant'}]