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': 'Viruses can be cultured in all except: \nSelect and explain. \nA. Chick embryo, B. Blood agar, C. Guinea pigs, D. Cell culture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]