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': 'Which of the following is the least acidic NSAID? \nSelect and explain. \nA. Aspirin, B. Etodolac, C. Diclofenac, D. Nabumetone', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Nabumetone o All NSAIDs are acidic in nature except nabumetone.", 'role': 'assistant'}]