This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Physiology
Which of the following are inactive during normal respiration - 
Select and explain. 
A. Pre-Botzinger complex, B. Dorsal group of neurons, C. Ventral VRG group of neurons, D. Pneumotaxic centre
C: Ventral VRG group of neurons
Answer: C: Ventral VRG group of neurons 
Explanation: Ans. (c) Ventral VRG group of neurons(Ref: Ganong, 25th ed/p.655)At rest, expiration is a passive processVentral VRG group of neurons controls expiration. So, they are inactive during normal respiration