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': 'During mandibular border molding, we ask the patient to touch handle of tray with the tongue to record: \nSelect and explain. \nA. Medial pterygoid, B. Palatoglossus, C. Mylohyoid, D. Superior constrictor of pharynx', 'role': 'user'}, {'content': 'Answer: B \nExplanation: For recording the distolingual border, hold the tray in place with the ﬁngers in each premolar region,\xa0while at the same time, asking the patient to place the tip of the tongue against the tray handle.\nThe\xa0action pulls forward\xa0the palatoglossal arches and conforms the impression material to its correct\xa0shape.', 'role': 'assistant'}]