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': 'Which is the medium used for Vibrio cholerae? \nSelect and explain. \nA. Thayer—Martin medium, B. TCBS medium, C. Scirrow’s medium, D. Loeffler’s medium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]