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': 'Chemical regulation of respiration is not affected by? \nSelect and explain. \nA. pH, B. pCO2, C. pO2, D. BP', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., BP", 'role': 'assistant'}]