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': "Johne's bacillus is - \nSelect and explain. \nA. Corynebacterium pseudotuberculosis, B. M. paratuberculosis, C. H. aegypticus, D. K. pneumoniae", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., M. paratuberculosis * M. paratuberculosis is also known as Johne's bacillus.", 'role': 'assistant'}]