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': 'Thymidylated RNA present in \nSelect and explain. \nA. mRNA, B. rRNA, C. tRNA, D. 16-S-RNA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The only RNA which contains thymidine (ribothymidine) is tRNA.', 'role': 'assistant'}]