The genus Nucleopolyhedrovirus belongs to which group of viruses?

The correct answer is Option (2) → Baculoviruses

Baculoviruses are pathogens that attack insects and other arthropods. Most of the baculoviruses used as biological control agents belong to the genus Nucleopolyhedrovirus. They are species-specific and act on a narrow range of insects, so they suit integrated pest management. The other virus groups named belong to other topics: bacteriophages infect bacteria, retroviruses (such as HIV) carry an RNA genome and are used as disarmed vectors for animal cells, and rhino viruses cause the common cold.

NCERT Extract:
Microbes as Biocontrol Agents – “… Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications.”