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': 'Punched out lesions on the alveolar ridge is due to: \nSelect and explain. \nA. Acrylic nodules on tissue facing surface of denture, B. Disturbed occlusion, C. Overextended borders of denture, D. Narrow occlusal table', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]