This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Pathology
[{'content': 'Hairy leukoplakia is characterized by? \nSelect and explain. \nA. Pain, B. EBV infection, C. No association with HIV, D. Pre-cancerous', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e. EBV infection Hairy leukoplakia (Oral hairy leukoplakia, OHL)* It is a condition caused by Epstein-Barr virus (EBV) and occurs usually in persons who are immunocompromised, especially those with HIV/AIDS.* It presents an asymptomatic white patch, which almost exclusively occurs on the lateral surfaces of the tongue. The lesion may grow to involve the dorsal surface of the tongue.* The texture is vertically corrugated ("hairy") or thickly furrowed and shaggy in appearance* The white appearance is created by hyperkeratosis (overproduction of keratin) and epithelial hyperplasia* Treatment is not necessary since the lesion is benign & self-limiting.', 'role': 'assistant'}]