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: Dental
[{'content': 'Over extension of complete denture for a prolonged period without adjustment may cause. \nSelect and explain. \nA. Epulis fissuratum, B. Pyogenic granuloma, C. Papillary hyperplasia, D. Giant cell reparative granuloma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]