This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2018, Subject name: Anatomy
Action of the muscle marked (with arrow) on mandible is 
Select and explain. 
A. Elevation, B. Depression, C. Retraction, D. Protraction
A: Elevation
Answer: A: Elevation 
Explanation: Muscle marked - temporalis Elevators of mandible: MTM Masseter Elevation, protraction Temporalis Elevation retraction Medial pterygoid Elevation, protraction Depressors of mandible Lateral pterygoid Depression, protraction Mylohyoid Depression Ant. belly of digastric Depression Muscle of mastication develop from 1st pharyngeal arch Nerve - mandibular branch of trigeminal.