This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexual Offenses, Subject name: Forensic Medicine
[{'content': 'Which one of the following does not stand as an identification for male sex? \nSelect and explain. \nA. Oval obturator foramen, B. V-shaped subpubic angle, C. Sternal index 54.3, D. Square chin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (C). Sternal index 54.3Sternal index: Length of manubrium/ Length of body x 100Male: 46.2Female: 54.3Q', 'role': 'assistant'}]