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: Surgery
[{'content': 'Thiopentone does not cause: \nSelect and explain. \nA. Fall in intracranial tension, B. Decreases oxygen consumption of brain, C. Decreases metabolic rate of brain, D. Decreases stage 2 of sleep', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Thiopentone decreases oxygen consumption, metabolic rate and ICT. That is why it is agent of choice for cerebral protection. On sleep it increases stage 2 and decreases stage 3, 4 and REM.', 'role': 'assistant'}]