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
AIDS was first diagnosed in patients suffering from 
Select and explain. 
A. Ciytococcus neoformans meningitis, B. Pneumocystis carini, C. Kaposi sarcoma, D. Tuberculosis
B: Pneumocystis carini
Answer: B: Pneumocystis carini 
Explanation: None