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: ENT
[{'content': 'Juvenile papillomatoses is caused by? \nSelect and explain. \nA. HPV, B. EBV, C. CMV, D. HSV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: There are two variants based on the age of onset: juvenileand adult laryngeal papillomatosis. The tumors are causedby human papillomavirus (HPV) infection of the throat. The tumors may lead to narrowing of the airway, which may cause vocal changes or airway obstruction.', 'role': 'assistant'}]