This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'All are true about Helminths, except? \nSelect and explain. \nA. Alimentary canal is complete in Nematodes, B. Body cavity is present in trematodes, C. Nematodes have separate sexes, D. Alimentary canal is absent in trematodes', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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', 'role': 'assistant'}]