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
Speed of rabies virus progress in axon is 
Select and explain. 
A. 100 mm/day, B. 150 mm/day, C. 200 mm/day, D. 250 mm/day
D: 250 mm/day
Answer: D: 250 mm/day 
Explanation: Speed of rabies virus progress in axon is 250 mm/day.