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': 'Patient is known to have increased intracranial tension. Which of the following agents are safe to use in this patient? \nSelect and explain. \nA. Ketamine, B. Thiopentone, C. Halothane, D. Ether', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Thiopentone is cerebroprotective because it reduces cerebral oxygen consumption, cerebral metabolic rate and intracranial pressure. Similar agent is propofol. Ref: Ajay Yadav, 3rd Edition, Page 68', 'role': 'assistant'}]