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': 'Which one given below is a DNA virus? \nSelect and explain. \nA. Polio virus, B. Adenovirus, C. Parvovirus, D. Hepatitis A virus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Adenovirus are grp of medium sized non envolped double stranded DNA REF:ANANTHA NARAYAN TEXT BOOK OF MICROBIOLOGY 9EDITION PGNO.480', 'role': 'assistant'}]