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
Beta-alanine is end product of metabolism of 
Select and explain. 
A. Uracil, B. Thymine, C. Guanine, D. Adenine
A: Uracil
Answer: A: Uracil 
Explanation: Uracil is a pyramidine and pyramidine metabolism produces beta alanine Ref-Sathyanarayana 4/e p380