<prompt> All are true about Helminths, except?Alimentary canal is complete in NematodesBody cavity is present in trematodesNematodes have separate sexesAlimentary canal is absent in trematodes  <response>: Ans. is d i.e., Body cavity is present in trematodes Alimentary canal is absent in trematodes Option b is absolutely incorrect Body cavity is absent in trematodes. Option d is also incorrect, but we can consider here it as paially correct because though the alimentary canal is present in trematodes, it is incomplete with no anus. Thus, option b is the best answer here though option d is also incorrect :? Table showing the differences between Cestodes, Trematodes and Nematodes Cestode Trematode Nematode Shape Tape-like; segmented Leaf-like; unsegmented Elongated, cylindrical; unsegmented Sexes Not separate, i.e., herma- phrodite monoecious Not separate Monoe? cious, except Schisto? somes which are diecious Separate diecious Head End Suckers, often with hooks Suckers, no hooks No suckers, no hooks Well-developed buccal capsule in some species Alimentary Absent Present but incomplete Present and complete canal no anus anus present Body cavity Absent Absent Present 