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 drugs is useful in chronic gout but is NOT a uricosuric agent ? 
Select and explain. 
A. Probenecid, B. Phenylbutazone, C. Sulfinpyrazone, D. Allopurinol
D: Allopurinol
Answer: D: Allopurinol 
Explanation: None