This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Pharmacology
[{'content': 'All of following statements about are true about 6-mercaptopurine EXCEPT: \nSelect and explain. \nA. It is metabolized by xanthine osidase, B. It does not cause hyperuricemia, C. Its dose should be reduced when allopurinol is given concurrently, D. It is an active metabolite of azathioprine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (Ref: KDT 6/e p823, 824) All anticancer drugs can result in hyperuricemia by causing the destruction of excess cells. Azathioprine is an immunosuppressant drug that acts by generating 6-MP', 'role': 'assistant'}]