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': 'Thiopentone is contraindicated in \nSelect and explain. \nA. Narcoanalysis, B. Neurosurgery, C. Acute intermittent porphyria, D. Induction of anaesthesia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Being an enzyme inducer (ALA synthetase)\xa0 thiopentone precipitates porphyria.', 'role': 'assistant'}]