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
Which of the following is an initial presentation of HIV infection when A is not staed? 
Select and explain. 
A. Primary CNS lymphoma, B. Kaposi sarcoma, C. Bacterial pneumonia, D. Extrapulmonary tuberculosis
C: Bacterial pneumonia
Answer: C: Bacterial pneumonia 
Explanation: 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