This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'Speed of rabies virus in axon is? \nSelect and explain. \nA. 1 mm per hour, B. 3 mm per hour, C. 5 mm per hour, D. 7 mm per hour', 'role': 'user'}, {'content': "Answer: B \nExplanation: The movement of virus in the axon is passive at a speed of about 3mm per hour. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO-532", 'role': 'assistant'}]