This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
[{'content': 'Which NSAIDs undergoes enterohepatic circulation \nSelect and explain. \nA. Phenylbutazone, B. Aspirin, C. Ibuprofen, D. Piroxicam', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Piroxicam is a long acting analgesic due to enterohepatic circulation. single daily dose is usually sufficient. Refer kDT 6/e p194', 'role': 'assistant'}]