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: Medicine
[{'content': 'AIDS was first diagnosed in patients suffering from \nSelect and explain. \nA. Ciytococcus neoformans meningitis, B. Pneumocystis carini, C. Kaposi sarcoma, D. Tuberculosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]