This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intravenous Anesthetic Agents, Subject name: Anaesthesia
[{'content': 'Which of the following opioid has local anaesthetic propey- \nSelect and explain. \nA. Tramadol, B. Meperidine, C. Fentanyl, D. Morphine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Unique among the commonly used opioids, meperidine has minor local anaesthetic qualities. Clinical use of meperidine Analgesia during labour and delivery and after surgery Most effective drug in suppressing post-operative shivering because of its effect on m and k receptor a2 agonist', 'role': 'assistant'}]