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: Anatomy
Oral diaphragm is formed by - 
Select and explain. 
A. Mylohyoid, B. Genioglossus, C. Hyoglossus, D. Buccinator
A: Mylohyoid
Answer: A: Mylohyoid 
Explanation: Mylohyoid muscle of each side unite to make a thin sheet of muscular floor (oral diaphragm) of oral cavity.