This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Transcription, Subject name: Biochemistry
Which type of RNA has the highest percentage of modified base: 
Select and explain. 
A. mRNA, B. tRNA, C. rRNA, D. snRNA
B: tRNA
Answer: B: tRNA 
Explanation: Type Percentage Characteristic feature Synthesis rRNA 80% Most abundant Nucleous tRNA 15% Smallest, Maximum modified bases Nucleus mRNA 5% Most heterogenous Nucleus