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
[{'content': 'Which of the following RNA contains thymidine \nSelect and explain. \nA. tRNA, B. Ribosomal RNA, C. Eukaryotic RNA, D. Prokaryotic RNA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Transfer RNA (tRNA) have modified bases.\nRibothymidine is a modified base of tRNA in which methyl group is added to uracil to form thymine.', 'role': 'assistant'}]