This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
[{'content': 'Which of the following drugs is contraindicated in a patient with raised intracranial pressure? \nSelect and explain. \nA. Thiopentone, B. Propofol, C. Midazolam, D. Ketamine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Cerebral blood flow, metabolism, oxygen consumption and ICT all are increased by ketamine - ketamine is contraindicated in raised ICT.(Refer: stoelting's pharmacology and physiology in anaesthetic practice, 5th edition, pg no.186-193)", 'role': 'assistant'}]