<prompt> Oral hairy leukoplakia is caused by ?CMVEBVKaposi sarcomaVaricella zoster  <response>: Oral hairy leukoplakia is caused by EBV. EBV causes: - Infectious mononucleosis - Naso pharyngeal carcinoma - Burkitts lymphoma - Hodgkins lymphoma Non Hodgkin lymphoma - Tonsillar carcinoma - Oral hairy leukoplakia. Refer to the image below - Duncan syndrome. fig:- Oral hairy leukoplakia Other viruses in the options above are not associated with the Oral hairy leukoplakia. 