This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral cavity, Subject name: Surgery
[{'content': 'All of the following are precancerous lesions for carcinoma oral cavity except:- \nSelect and explain. \nA. Erythroplakia, B. Speckled erythroplakia, C. Discoid lupus erythematosus, D. Chronic hyperplastic candidiasis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Conditions Associated with Malignant Transformation High - risk Lesions Medium - risk Lesions Low risk or Equivocal - risk Lesions Erythroplakia Speckled Erythroplakia Chronic hyperplastic candidiasis Oral submucous fibrosis Syphilitic glossitis Sideropenic dysphagia (Paterson - Kelly syndrome) Oral lichen planus Discoid lupus erythematosus Discoid keratosis congenital', 'role': 'assistant'}]