This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neck Triangles and parotid gland, Subject name: Anatomy
Base of Submental triangle is formed by 
Select and explain. 
A. Chin, B. Omohyoid, C. Hyoid, D. Diagastric
C: Hyoid
Answer: C: Hyoid 
Explanation: Boundaries of Sub Mental Triangle Apex - Symphysis Menti Base - Hyoid Bone On each side - Anterior belly of Digastric Content - Sub Mental nodes Floor - Mylohyoid