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': 'Sodium nitroprusside infusion may result in – \nSelect and explain. \nA. Hypertension, B. Pulmonary oedema, C. Cyanide toxicity, D. Heart block', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sodium nitropruside has five cyanide groups with in its structure and Cyanide toxicity is a problem if it is used is in high doses.', 'role': 'assistant'}]