The smallest known animal RNA virus is

Polio

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Chickenpox

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Rabies

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Measles

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Solution

The correct option is A Polio
The polio virus is the smallest known virus. It contains RNA in the spherical capsid. Poliovirus attacks the nervous system. Poliomyelitis is caused by the polio virus.

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Influenza virus, poliomyelitis and rhino virus contain RNA . Single or double?

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