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: Surgery
[{'content': "All of the following predispose to squamous cell carcinoma, EXCEPT - \nSelect and explain. \nA. Lichen planus of mouth, B. Bowen's disease, C. Inverted papilloma of nose, D. Chronic irritation of oral mucosa by jagged teeth", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]