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: Biochemistry
Which of the following compounds is an analogue of hypoxanthine ? 
Select and explain. 
A. Arabinoside C, B. Allopurinol, C. Ribose phosphate, D. 5-phosphoribosylpyrophosphate (PRPP)
B: Allopurinol
Answer: B: Allopurinol 
Explanation: Allopurine is hypoxanthine analogue.
Arabinoside-C (ara-c or cytarabine or cytosine arabinoside) is a deoxycytidine analogue.