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
The following virus isn't enveloped virus but contains double stranded RNA 
Select and explain. 
A. Adenovirus, B. Reovirus, C. CMV, D. Hepatitis B virus
B: Reovirus
Answer: B: Reovirus 
Explanation: Reovirus, rotavirus and Colorado tick virus are double-stranded RNA viruses with no envelope DS RNA viruses doesn't have envelope Ref: Baveja 5th ed Pg: 423