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: Pediatrics
[{'content': 'Most common manifestation of HPV infection in children : \nSelect and explain. \nA. Single papilloma, B. Multiple papillomatosis, C. Osteoma, D. Sarcoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Multiple warts are common.', 'role': 'assistant'}]