This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Properties of Virus, Subject name: Microbiology
Function of reverse transcriptase - 
Select and explain. 
A. RNA dependent DNA synthesis, B. DNA dependent RNA synthesis, C. DNA dependent DNA synthesis, D. RNA dependent RNA synthesis
A: RNA dependent DNA synthesis
Answer: A: RNA dependent DNA synthesis 
Explanation: Ans. is 'a' i.e., RNA dependent DNA synthesis o 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' directiono It is seen in retro viruses (e.g. HIV).