This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial infection, Subject name: Medicine
[{'content': 'Which of the following is an initial presentation of HIV infection when A is not staed? \nSelect and explain. \nA. Primary CNS lymphoma, B. Kaposi sarcoma, C. Bacterial pneumonia, D. Extrapulmonary tuberculosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: One of the earliest oppounistic infection - Pneumonia It could be:- a)Bacterial Pneumonia b)Fungal Pneumonia MC cause of pneumonia in HIV patient is Pneumococcus CD4 < 500: TB < 200: P. JIROVECI', 'role': 'assistant'}]