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': 'Lingual flange in the posterior region is determined by: \nSelect and explain. \nA. Genioglossus, B. Mylohyoid, C. Superior constrictor, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lingual ﬂange in the anterior region is determined by genioglossus, in molar region by mylohyoid in posterior region it is determined by palatoglossus and superior constrictor.\nLabial border is determined by buccinator and masseter.', 'role': 'assistant'}]