This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology Pa-2 (RNA Virus Pa-1,2 & Miscellaneous Viruses), Subject name: Microbiology
Which of the following is RNA virus? 
Select and explain. 
A. Hepatitis B virus, B. Parainfluenza virus, C. Adenoviruses, D. Herpes simplex virus.
B: Parainfluenza virus
Answer: B: Parainfluenza virus 
Explanation: Option 2: Parainfluenza virus contains a single-stranded, nonsegmented, negative- sense RNA genome with nucleoproteins P and L. It is surrounded by a helical nucleocapsid, which contains glycoprotein spikes. Options 1,3 ,5 are DNA viruses. List of DNA viruses: Herpes viruses (Herpesviridae family) HBV Parvovirus B virus HPV JC virus and BK virus Variola (Smallpox) and Molluscum contagiosum virus Human adenovirus