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': 'Commonest mycobacterial infection is patient is tropical contries - \nSelect and explain. \nA. M. Leprae, B. M. avium intracellulare, C. M. tuberculosis, D. M. kansasii', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., M. tuberculosis", 'role': 'assistant'}]