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 anaesthetic agent increases intracranial tension among the following \nSelect and explain. \nA. Thiopentone, B. Propofol, C. Lignocaine, D. Sevoflurane', 'role': 'user'}, {'content': 'Answer: D \nExplanation: All inhalational anaesthetics directly act on cerebral blood vessels→vasodilatation→increase cerebral blood flow→ increase intracranial tension', 'role': 'assistant'}]