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': 'A structural component that is found in all viruses is: \nSelect and explain. \nA. The envelope, B. DNA, C. Capsid, D. Tail fibers', 'role': 'user'}, {'content': 'Answer: C \nExplanation: c (Capsid)', 'role': 'assistant'}]