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 isolated from clinical samples by cultivation in the following except: \nSelect and explain. \nA. Tissue culture, B. Embryonated eggs, C. Animals, D. Chemically defined media', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]