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
Depression and Protrusion of the mandible: 
Select and explain. 
A. Medial (INTERNAL) pterygoid muscle, B. Lateral (EXTERNAL) pterygoid muscle, C. Masseter muscle, D. Temporalis muscle
B: Lateral (EXTERNAL) pterygoid muscle
Answer: B: Lateral (EXTERNAL) pterygoid muscle 
Explanation: None