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
In which of the following has genome double stranded nucleic acid - 
Select and explain. 
A. Ohomyxoviruses, B. Poxviruses, C. Parvoviruses, D. Reoviruses
B: Poxviruses
Answer: B: Poxviruses 
Explanation: Ans. is 'b' i.e., Poxviruses First see the list of DNA & RNA viruses from above explanation and then read the following impoant facts. . All DNA viruses have double stranded nucleic acid except for Parvovirus, which has single stranded DNA. . All RNA viruses have single stranded nucleic acid except for Reoviridae (Rota virus, Reo virus), which has double stranded RN.4.