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: ENT
[{'content': 'Which of the following is not a premalignant condition oral cancer- \nSelect and explain. \nA. Leukoplakia, B. Erythroplakia, C. Oral submucous fibrosis, D. Systemic Sclerosis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Systemic Sclerosis Lesions with increased risk of malignancy in oral cancero Premalignant condition:- Leukoplakia, Erythroplakia, Speckled erythroplakia, chronic hyperplastic candidiasiso Conditions increasing risk:- Oral submucous fibrosis, syphilitic glossitis, sideropenic dysphagia (Peterson Kelly syndrome).o Risk is doubtful:- Oral lichen planus, DLE, Dyskeratosis congenita.", 'role': 'assistant'}]