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': 'All of the following organisms cause interstitial pneumonia except - \nSelect and explain. \nA. Pneumocystis carinii, B. Mycoplasma pneumoniae, C. Legionella pneumophilia, D. Haemophilus influenzae', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]