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
[{'content': 'Pacemaker cells of respiration are located in \nSelect and explain. \nA. Pneumotaxic centre, B. Apneustic centre, C. Dorsal Respiratory Group, D. Pre - Botzinger complex', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Pacemaker cells are in Pre - Botzinger complex which is a part of Ventral Respiratory Group.', 'role': 'assistant'}]