This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
[{'content': 'Which of the following compounds is an analogue of hypoxanthine? \nSelect and explain. \nA. Arabinoside C, B. Allopurinol, C. Ribose phosphate, D. 5-phosphoribosylpyrophosphate (PRPP)', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Allopurinol acts on purine catabolism, without disrupting the biosynthesis of purines. It reduces the production of', 'role': 'assistant'}]