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: Unknown
[{'content': 'Cholera is caused by? \nSelect and explain. \nA. Vibrio cholera.01, B. Enterococcus, C. V. Parahemolyticus, D. E.coli', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) Vibrio cholera.01, (B) Vibrio cholera 0139REF: Harrisons 18th ed chapter 156While the term cholera has occasionally been applied to any severely dehydrating secretory diarrheal illness, whether infectious in etiology or not, it now refers to disease caused by V. cholerae serogroup O1 or O139i.e., the serogroups with epidemic potential', 'role': 'assistant'}]