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: Pharmacology
[{'content': 'Remifentanil is : \nSelect and explain. \nA. Useful for short painful procedures, B. Metabolized by plasma esterases, C. Equipotent as fentanyl, D. All of these', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Remifentanil is shortest acting opioid due to its metabolism by plasma esterases.\nDue to its short duration of action, it is indicated for short-term painful procedures.\nIntravenous bolus dosing is not practical because of the short duration of action, rather it is administered by constant i.v. infusion.\nPotency is equal to fentanyl and similarly, it can also cause post-operative muscle rigidity.', 'role': 'assistant'}]