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: Medicine
[{'content': 'A 32-year-old male, Kann, who recently visited a sea coast presented with ulcer over the left leg. The probable cause is - \nSelect and explain. \nA. Pasturella multocida, B. Micrococcus halophillus, C. Vibrio vulnificus, D. Neisseria gonorrhea', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]