This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Complications Of Anaesthesia, Subject name: Anaesthesia
[{'content': 'Anesthetic agent causing bradycardia is? \nSelect and explain. \nA. Gallamine, B. Vecuronium, C. Ketamine, D. Morphine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Morphine * Bradycardia is caused by - Succinylcholine, propofol, opioids anaesthetics (Morphine, fentanyl and its cogneres).* Tachycardia is caused by - Gallamine, Pancuronium, Rocuronium, Ketamine, Thiopentone, Methohexitone.", 'role': 'assistant'}]