The correct option is B insecticide
Sporeine is the trade name given to the commercial product made from Bt toxin (Bacillus thuringensis). Bt toxin is used as a bioinsecticide. It is used to suppress the population of many coleoptereious and lepidopterous larvae in Russia, USA and many European countries. The active ingredient in Bt is a toxic protein, that actually binds to specific sites on the midgut.