Petuvirus is a genus of viruses, in the family Caulimoviridae. Plants serve as natural hosts. There is currently only one species in this genus: the type species Petunia vein clearing virus. Diseases associated with this genus include: plants: chlorotic vein clearing, leaf malformation.
Can we infer the following?
petuvirus is a bacterium.

Choices: I. Yes; II. It's impossible to say; III. No;
The answer is:
III.