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': 'DNA and RNA both contain which pyrimidine base? \nSelect and explain. \nA. Uracil, B. Thymine, C. Cytosine, D. Guanine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Thymine is a pyrimidine base present in both DNA and RNARef: D.M.Vasudevan 7th edition, page no: 560', 'role': 'assistant'}]