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
Modified base is seen in - 
Select and explain. 
A. tRNA, B. rRNA, C. hnRNA, D. mRNA
A: tRNA
Answer: A: tRNA 
Explanation: Ans. is 'a' i.e., tRNA