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
Muscle, which pulls the disk of TMJ downward: 
Select and explain. 
A. Lateral pterygoid, B. Medial pterygoid, C. Digastric, D. Mylohyoid
A: Lateral pterygoid
Answer: A: Lateral pterygoid 
Explanation: Lateral pterygoid is the only muscle of mastication, which is inserted into anterior margin of articular disc and capsule of TMJ by lower head and to pterygoid fovea of neck of mandible, by superior head.
It pulls the disk of TMJ downwards, depressing the mandible.