This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Which is ssrna unenveloped virus - 
Select and explain. 
A. HBV, B. HEV, C. HCV, D. None
B: HEV
Answer: B: HEV 
Explanation: HEV a spherical non envoloped virus with a single stranded RNA genome REF:ANANTHANARAYANAN TEXT BOOK OF MICROBIOLOGY 9EDITION PGNO.550