This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'All are non scrapable white lesions, except: \nSelect and explain. \nA. Leukoplakia, B. Lichen planus, C. Chemical burns, D. White sponge nevus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Non-Scrapable\xa0White Lesions\n\nLeukoplakia\xa0\xa0\nLichen planus\xa0\nLinea alba\nFrictional hyperkeratosis\xa0\xa0\nWhite sponge nevus\xa0\xa0\nDyskeratosis congenita\nChronic hyperplastic candidiasis.', 'role': 'assistant'}]