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': 'Oral hairy leukoplakia is caused by - \nSelect and explain. \nA. HSV, B. HIV, C. CMV, D. HPV', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Oral hairy leukoplakia is GI manifestation of HIV REF:MICROBIOLOGY ANANTHA NARAYANAN NINTH EDITION PAGE.576', 'role': 'assistant'}]