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': 'The egg which of the following parasites consist of polar filaments arising from either end of the ambrophore- \nSelect and explain. \nA. Taenia saginata, B. Taenia solium, C. Echinococcus granulosus, D. Hymenolepis nana', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]