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
True regarding respiratory center is 
Select and explain. 
A. Directly stimulated by fall in PaO2, B. Inhibited during swallowing, C. Connected with cardiac center, D. Situated in midbrain
B: Inhibited during swallowing
Answer: B: Inhibited during swallowing 
Explanation: B i.e. Inhibited during swallowing