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: Dental
Lip and mentalis muscle contraction are not seen in: 
Select and explain. 
A. Mature swallow, B. Simple tongue thrust, C. Complex tongue thrust, D. All of the above
A: Mature swallow
Answer: A: Mature swallow 
Explanation: None