This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'RNA dependent DNA polymerase is found in: \nSelect and explain. \nA. Retrovirus, B. Rota-virus, C. Reo-virus, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. RetrovirusRetroviruses: -a. Positive stranded RNA virusesb. Have a diploid genomec. 100 nm in diameterd. Possess reverse transcriptase enzyme (RNA dependent DNA polymerase) as they replicate through a DNA intermediate.', 'role': 'assistant'}]