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: Gynaecology & Obstetrics
[{'content': 'Pelvic diaphragm consists of all except \nSelect and explain. \nA. Pubococcygeus, B. Iliococcygeus, C. Ischiocavernous, D. Ischiococcygeus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Levator ani muscle forms pelvic diaphragm. Levator ani muscle consists of three main divisions.\n\nPubococcygeus\nIliococcygeus\nIschiococcygeus.', 'role': 'assistant'}]