Enterobius vermicularis belong to the phylum Aschelminthes (roundworm) and is called pinworm as it is a tiny and narrow worm, also known as threadworm or seatworm. They're white in color and less than a half-inch long.Schistosoma haematobium is commonly called a blood fluke and belongs to the phylum Platyhelminthes.Wuchereria bancrofti is a thread-like filarial nematode. Ancylostoma duodenale is also a nematode and is commonly called an old-world hookworm. Thus, the correct answer is option D.