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
Lingual flange in the posterior region is determined by: 
Select and explain. 
A. Genioglossus, B. Mylohyoid, C. Superior constrictor, D. All of the above
C: Superior constrictor
Answer: C: Superior constrictor 
Explanation: 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.
Labial border is determined by buccinator and masseter.