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': 'Succinylcholine is used with caution in all except – \nSelect and explain. \nA. Mysthenia gravis, B. Burns, C. Crush injury, D. Tachycardia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Sch is the only muscle relaxant that causes vagal stimulation → Causes bradycardia. (attenuates tachycardia & hypertension).\nIn burns, crush injury and mysthenia gravis can cause severe hyperkalemia.', 'role': 'assistant'}]