A patient after undergoing thoracotomy complains of severe pain. He can be managed by –: (A) Intercostal cryoanalgesia, (B) I.V. fentanyl, (C) Oral morphine, (D) Oral brufen
Answer is B. Gold standard for management of post-thoracotomy pain → Epidural opioids (epidural analgesia)
But, amongst the given options IV fentanyl (IV opioid) is the best answer.

Management of post-thoracotomy pain

Gold Standard → Central neuraxial analgeria (Thoracic epidural opioids)
Second choice → Parentral opioid