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
The buccal frenal attachment of mandibular denture should 
be trimmed and rounded to allow proper function of 
Select and explain. 
A. Massetor, B. Buccinator, C. Triangularis, D. Zygomaticus major
C: Triangularis
Answer: C: Triangularis 
Explanation: None