This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Generation time for leprosy bacillus is? \nSelect and explain. \nA. 8-10 days, B. 10-12 days, C. 12-15 days, D. 15-20 days', 'role': 'user'}, {'content': 'Answer: C \nExplanation: <p> The generation time of the lepra bacillus has been found to be exceptionally long ,12-13 days on the average but may vary from 8-42 days. Reference:Textbook of Microbiology, Ananthanarayan & Paniker ,9th edition,page no:364. <\\p>', 'role': 'assistant'}]