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': 'Dihydrouridine is found in \nSelect and explain. \nA. DNA, B. mRNA, C. tRNA, D. rRNA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Dihydrouridine (abbreted as D, DHU, or UH2) is a pyrimidine which is the result of adding two hydrogen atoms to a uridine, making it a fully saturated pyrimidine ring with no remaining double bonds. D is found in tRNA and rRNA molecules as a nucleoside; the corresponding nucleobase is 5,6-dihydrouracil Ref- Sathyanarayana 4/e', 'role': 'assistant'}]