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
Which of the following is the least acidic NSAID? 
Select and explain. 
A. Aspirin, B. Etodolac, C. Diclofenac, D. Nabumetone
D: Nabumetone
Answer: D: Nabumetone 
Explanation: Ans. is 'd' i.e., Nabumetone o All NSAIDs are acidic in nature except nabumetone.