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': 'Darting motility is shown by - \nSelect and explain. \nA. Proteus, B. Serratia, C. Vibrio, D. E. coli', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]