<prompt> Example of scrapable white lesion is are:Diphtheritic patchSyphilitic mucous patchPseudomembranous candidiasisAll of the above  <response>: Pseudomembranous Candidiasis - clinically appears as white to yellowish-white plaques which can be easily scraped off, exposing red areas. Diphtheritic membrane or patch, which often begins on the tonsils and enlarges, becoming confluent over the surface. This false membrane is grayish-green, thick, and fibrinous, and is composed of dead cells, leukocytes and bacteria overlying necrotic, ulcerated areas of the mucosa tends to be adherent and leaves a bleeding surface if stripped away.The oral lesions of syphilis, called mucous patches, are usually multiple, painless, grayish-white plaques overlying an ulcerated surface.Ref: Shafers textbook of oral pathology 7th edition 