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
Anesthetic agent causing bradycardia is? 
Select and explain. 
A. Gallamine, B. Vecuronium, C. Ketamine, D. Morphine
D: Morphine
Answer: D: Morphine 
Explanation: 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.