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': 'Co, causes? \nSelect and explain. \nA. Decrease respiratory drive, B. Reduces cerebral blood flow, C. Depresses vasomotor centre, D. Respiratory stimulation by central chemoreceptors', 'role': 'user'}, {'content': "Answer: D \nExplanation: Respiratory stimulation by central chemoreceptors REF: Ganong's 22' ed chapter 31 Co, causes direct stimulation of vasomotor centre", 'role': 'assistant'}]