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
Hub of wheels not formed by? 
Select and explain. 
A. Buccinator, B. Orbicularis oris, C. Levator anguli oris, D. Mentalis
D: Mentalis
Answer: D: Mentalis 
Explanation: Hub of wheels = Modiolus

Present on corner of mouth
Lie at level of maxillary first premolar tooth
Mentalis is not a part of it