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 masseteric notch in distobuccal corners of the mandibular denture is due to \nSelect and explain. \nA. Action of buccinator on masseter, B. Action of masseter on buccinator, C. Palatoglossus on buccinator, D. Superior constrictor on masseter', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]