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': 'Following is true of T. pallidum, except - \nSelect and explain. \nA. Can be maintained in rabbit testis, B. Motile by peritrichate flagella, C. To visualise, dark ground microscopy is used, D. TPI test is very-useful', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]