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': 'All of the following statements are true regarding poliovirus, except: \nSelect and explain. \nA. It is transmitted by feco-oral route, B. Asymptomatic infections are common in children, C. There is a single serotype causing infection, D. Live attenuated vaccine produces herd immunity', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., There is a single serotype causing infection There are 3 types of poliovirus which are associated with infection.", 'role': 'assistant'}]