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
Which is ssrna unenvloped virus - 
Select and explain. 
A. HBV, B. HEV, C. I-ICV, D. None
B: HEV
Answer: B: HEV 
Explanation: Ans. is 'b' i.e., HEV HEV and HAV are non-enveloped RNA viruses.