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': 'Oropharyngeal carcinoma is caused by \nSelect and explain. \nA. HBV, B. CMV, C. HSV, D. HPV', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. d. HPV', 'role': 'assistant'}]