This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'CCEY medium is used for culture of? \nSelect and explain. \nA. C jejuni, B. C difficile, C. Yersinia pestis, D. Actinomycosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]