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
Viruses can be isolated from clinical samples by cultivation in the following except: 
Select and explain. 
A. Tissue culture, B. Embryonated eggs, C. Animals, D. Chemically defined media
D: Chemically defined media
Answer: D: Chemically defined media 
Explanation: None