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': 'The Generation time in coliform bacilli is \nSelect and explain. \nA. 2 seconds, B. 20 seconds, C. 20 minutes, D. 2 hours', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Population doubling time or the generation time of\n\nE.coli is 20 mins\nMTB is 20 hours\nM. leprae is 20 days.', 'role': 'assistant'}]