This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nucleotides, Subject name: Biochemistry
Uric acid is conveed to allantoin in: 
Select and explain. 
A. Catabolism of pyrimidines, B. Catabolism of purines, C. Synthesis of pyrimidines, D. Synthesis of purines
B: Catabolism of purines
Answer: B: Catabolism of purines 
Explanation: Uric acid is the final excretory product of purine metabolism in humans. antioxidant by getting itself conveed (non enzymatically) to allantoin