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
A structural component that is found in all viruses is: 
Select and explain. 
A. The envelope, B. DNA, C. Capsid, D. Tail fibers
C: Capsid
Answer: C: Capsid 
Explanation: c (Capsid)