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': 'Ketamine is safe in – \nSelect and explain. \nA. Raised ICT, B. Open eye injury, C. Ischemic heart disease, D. Severe shock', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ketamine increases cardiac output and blood pressure → Intravenous anaesthetic of choice in shock.', 'role': 'assistant'}]