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': "Central Chemoreceptors are mot sensitive to following changes in blood: \nSelect and explain. \nA. TPCO2, B. i,PCO2, C. TH', D. TP02", 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. TPCO2', 'role': 'assistant'}]