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': 'Bradycardia is common after injection of – \nSelect and explain. \nA. Midazolam, B. Succinyl choline, C. Dopamine, D. Isoprenaline', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Succinylcholine is the only muscle relaxant, which stimulates vagus → Bradycardia.', 'role': 'assistant'}]