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: Physiology
Stimulating mechanoreceptors or nociceptors in mouth triggers the 
Select and explain. 
A. Jaw opening reflex, B. Jaw clenching reflex, C. Jaw gnashing reflex, D. None of the above
A: Jaw opening reflex
Answer: A: Jaw opening reflex 
Explanation: None