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
Oral hairy leukoplakia occurs in 
Select and explain. 
A. Carcinoma tongue, B. Oral cardidiasis, C. HIV-AIDS, D. Infectious mononucleosis
C: HIV-AIDS
Answer: C: HIV-AIDS 
Explanation: 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.