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
Which of the following is not a features of simple tongue thrust swallowing 
Select and explain. 
A. Contraction of facial muscle, B. Contraction of mandibular elevators, C. Teeth apart swallow, D. Anterior open bite
C: Teeth apart swallow
Answer: C: Teeth apart swallow 
Explanation: None