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': 'A patient after undergoing thoracotomy complains of severe pain. He can be managed by – \nSelect and explain. \nA. Intercostal cryoanalgesia, B. I.V. fentanyl, C. Oral morphine, D. Oral brufen', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Gold standard for management of post-thoracotomy pain → Epidural opioids (epidural analgesia)\nBut, amongst the given options IV fentanyl (IV opioid) is the best answer.\n\nManagement of post-thoracotomy pain\n\nGold Standard → Central neuraxial analgeria (Thoracic epidural opioids)\nSecond choice → Parentral opioid', 'role': 'assistant'}]