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': 'The coronoid process: \nSelect and explain. \nA. Limits the extension of maxillary posterior teeth setting, B. Limits the thickness of the distobuccal flange of the upper complete denture, C. Limits the thickness of the distobuccal flange of the lower complete denture, D. Determines PPS', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]