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': "All the following are exceptions to Koch's postulates except? \nSelect and explain. \nA. Mycobacterium Leprae, B. Treponema pallidum, C. Neisseria gonorrhoea, D. Vibrio cholerae", 'role': 'user'}, {'content': 'Answer: D \nExplanation: M leprae & T pallidum –\xa0Cannot be grown invitro however can be maintained in animals.\nN gonorrhoea –\xa0There is no animal model, however bacteria can be grown in vitro.', 'role': 'assistant'}]