This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'The virus with smallest genome is ? \nSelect and explain. \nA. Reovirus, B. Parvovirus, C. Picornavirus, D. HIV', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Parvovirus . Smallest genome ----> Parvovirus . Largest genome --> Poxvirus", 'role': 'assistant'}]