Explanation

The question asks for a type of insecticide formulation. Dust (D) is a common solid formulation where the active ingredient is mixed with fine particles. EC (Emulsifiable Concentrate), Granular, and Fungiments are also formulations, but 'Fungiments' is not a standard term for an insecticide formulation; it seems to be a made-up or misspelled word. Dust is a widely recognized and correct example of an insecticide formulation.