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: Radiology
[{'content': 'A patient suffering from AIDS presents with history of dyspnea and non- productive cough x-ray shows bilateral perihilar opacities without pleural effusion and lymphaden-opathy. Most probable etiological agent is : \nSelect and explain. \nA. Tuberculosis, B. CMV, C. Kaposis sarcoma, D. Pneumocystis carinii', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Pneumocystic carinii', 'role': 'assistant'}]