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
Pacemaker of respiration? 
Select and explain. 
A. Dorsal nuclear group, B. Apneustic centre, C. Pnemotaxic centre, D. Pre Botzinger complex
D: Pre Botzinger complex
Answer: D: Pre Botzinger complex 
Explanation: D i.e. Pre Botzinger complex