Find out the incorrect match with regard to body divisions.
Ancylostoma - Head, throax and abdomen
Pila - Head, muscular foot and visceral hump
Balanoglossus - Proboscis, collar and trunk
Pheretima - Pre-clitellar, clitellar and post clitellar regions
Ancylostoma belongs to Aschelminthes.
Head, thorax and abdomen are the body divisions in arthropods (not in roundworms).