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
Which of the following is coding RNA 
Select and explain. 
A. sn RNA, B. mRNA, C. Both sn RNA and mRNA, D. mi RNA
B: mRNA
Answer: B: mRNA 
Explanation: rRNA, Lnc RNA, sn RNA, mi RNA, tRNA are all non coding RNA.
Only mRNA is coding RNA.