Polio virus has

ssDNA

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dsDNA

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ssRNA

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dsRNA

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Solution

The correct option is B ssRNA
Poliovirus is the causative agent of polio and it is a human enterovirus. Poliovirus is composed of an RNA genome and a protein capsid. The genome is a single-stranded positive-sense RNA genome that is about 7500 nucleotides long. So, the correct answer is 'ss RNA'.

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