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: Anaesthesia
[{'content': 'Which of the following increases cerebral oxygen consumption \nSelect and explain. \nA. Propofol, B. Ketamine, C. Thiopentone, D. Alfentanyl', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ketamine This has been discussed so many times that ketamine increases cerebral oxygen consumption. It increases the intracranial tension too. Thiopentone and propofol decrease cerebral oxygen consumption. Alfentanyl is an opioid and opioids in general reduce cerebral oxygen consumption, cerebral blood flow and intracranial pressure.', 'role': 'assistant'}]