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
[{'content': 'The Norwalk virus is a \nSelect and explain. \nA. DNA virus, B. RNA virus, C. Prion, D. Bacteriophage induced virus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Viral gastroenteritis:FamilyVirusViral genomeReoviridaeRotavirusdsRNACalciviridaeNorovirus/Norwalk virusSapovirusss(+)RNAAdenoviridaeAdenovirusdsDNAAstroviridaeAstrovirusss(+)RNACoronaviridaeCoronavirusTorovirusss(+)RNAPicornaviridaeAichi virusss(+)RNAPicobirnaviridaePicobirnavirusdsRNAParvoviridaeBocavirusssDNAParamyxoviridaeHendra virusNipah v irusSs(-)RNA(Ref: Ananthanarayan 9th edition, 562)', 'role': 'assistant'}]