This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
[{'content': 'Oral hairy leukoplakia occurs in \nSelect and explain. \nA. Carcinoma tongue, B. Oral cardidiasis, C. HIV-AIDS, D. Infectious mononucleosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hairy leukoplakia is a distinctive oral lesion that is usually seen in immunocompromised patients. Approx 80% of patients with hairy leukoplakia are infected with HIV; the presence of this lesion sometimes calls attention to the existence of HIV infection. However rest 20% are seen in Immunocompromised due to cancer therapyor transplant immunosuppression. ref:Robbins pathologic basis of disease; Edition 8 ;pg;743.', 'role': 'assistant'}]