This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
[{'content': 'Which of the following are inactive during normal respiration? \nSelect and explain. \nA. Pre-Botzinger complex, B. Dorsal respiratory group of neurons (DRG), C. Ventral respiratory group of neurons (VRG), D. Pneumotaxic Centre', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Quite expiration is passive, the Ventral respiratory group of neurons is active only during deep breathing Ref: Ganong 25th ed/page 655', 'role': 'assistant'}]