Which one of the following microbial agents is being commercially exploited as biocontrol agent

Answer: Option C

Trichoderma viridiae is a type of fungus that can block the life cycle of many pathogens and most specifically various other fungi that is the reason which makes it an amazing biological control agent against various pathogens that leads to its exploitation on a commercial level. It is a free-living fungus that grows mainly on the roots area of the plant present in the soil, it enhances the fertility of the soil, boosts plant growth and protects the plants from various pathogens.