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 type of RNA has the highest percentage of modified base ? \nSelect and explain. \nA. mRNA, B. tRNA, C. rRNA, D. snRNA', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In eukaryotic cells, 10-20% of the bases in tRNA may be modified and known as modified or unusual bases.', 'role': 'assistant'}]