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: Microbiology
[{'content': 'A patient is suffering from pneumonia. Laboratory study shows acid-fast filamentous bacterium. The causative organism is ? \nSelect and explain. \nA. M. tuberculosis, B. Actinomyces, C. Nocardia, D. Mycobacterium Avium intracellulare', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Nocardia Symptoms of pneumonia by a filamentous acid fast bacterium suggest the diagnosis of Nocardia.", 'role': 'assistant'}]