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
Muscle which has influence in the formation of buccal frenum of maxilla 
Select and explain. 
A. Levator anguli oris, B. Quadratus labii superioris, C. Triangularis, D. Inferioris
A: Levator anguli oris
Answer: A: Levator anguli oris 
Explanation: None