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
Micro RNA transcribed by: 
Select and explain. 
A. RNA polymerase I, B. RNA polymerase II, C. RNA polymerase III, D. DNA polymerase
B: RNA polymerase II
Answer: B: RNA polymerase II 
Explanation: RNA polymerase II