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: Microbiology
Which of the following contain(s) an RNA dependent DNA polymerase as a structural component of the virion - 
Select and explain. 
A. Adenoviruses, B. Ohomyxoviruses, C. Rhabodoviruses, D. RNA tumor viruses
D: RNA tumor viruses
Answer: D: RNA tumor viruses 
Explanation: Ans. is 'd' i.e., RNA tumor viruses . RNA dependent DNA polymerase (reverse transcriptase) is characteristic of Reteroviridae family. . These are RNA tumor viruses and related agents.