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
When the jaw is opened 
Select and explain. 
A. Condyles move upwards, B. Articular disc moves posteriorly, C. Lateral pterygoids contract, D. Condyles moves around vertical axis
C: Lateral pterygoids contract
Answer: C: Lateral pterygoids contract 
Explanation: None