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': 'Beta-alanine is end product of metabolism of \nSelect and explain. \nA. Uracil, B. Thymine, C. Guanine, D. Adenine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Uracil is a pyramidine and pyramidine metabolism produces beta alanine Ref-Sathyanarayana 4/e p380', 'role': 'assistant'}]