The correct option is D Wuchereria bancrofti
Filariasis, commonly called as elephantiasis, is a parasitic infection that causes extreme swelling in the arms and the legs. The disease is caused by a filarial worm, which is transmitted from human to human via female mosquito when it takes a blood meal. Wuchereria bancrofti is one such nematode parasite that causes filariasis.
So, the correct answer is option D.