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: Dental
[{'content': '“Ivory towers of disease” is referred to? \nSelect and explain. \nA. Small health centres, B. Large hospitals, C. Private practitioners, D. Health insurance companies', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Large hospitals cater to make number of patients and hence called ivory towers of disease.', 'role': 'assistant'}]