The correct option is B Drosophila melanogaster
Drosophila melanogaster is a species of fly (the taxonomic order Diptera) in the family Drosophilidae. The species is known generally as the common fruit fly (though inaccurately) or vinegar fly. melanogaster is a common pest in homes, restaurants, and other places where food is served.
So, the correct option is "A" (Drosophila melanogaster).