This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNA Replication , Subject name: Biochemistry
RNA dependent DNA polymerase is - 
Select and explain. 
A. DNA polymerase, B. RNA polymerase, C. Reverse transcriptase, D. Phosphokinase
C: Reverse transcriptase
Answer: C: Reverse transcriptase 
Explanation: Ans. is 'c' i.e., Reverse transcriptaseo Reverse transcriptase is an RNA dependent DNA polymerase that produces ds DNA from RNA template. It moves along the template in 3' -5' direction, synthesizing DNA is 5' - 3' direction, It is seen in retro viruses (e.g. HIV).