This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology (RNA Virus Pa-1,2 & Miscellaneous Viruses), Subject name: Microbiology
Enterovirus 72 is: 
Select and explain. 
A. Hepatitis A, B. Hepatitis B, C. Hepatitis C, D. Hepatitis E
A: Hepatitis A
Answer: A: Hepatitis A 
Explanation: Hepatitis A virus was originally classified as Enterovirus type 72 but is now assigned to a separate genus Hepatovirus in the family Picornaviridae. Picornaviruses are Icosahedral, 28-30 nm (small size), nonenveloped single stranded RNA viruses; Linear positive sense RNA genome. Hepatitis B : belongs to Hepadnaviridae , DNA virus. Hepatitis C : belongs to Flaviviridae, RNA virus. Hepatitis E: belongs to Hepeviridae , RNA virus.