This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification - Medicolegal aspects, Subject name: Forensic Medicine
[{'content': 'Which is best used for sex differentiation? \nSelect and explain. \nA. Pelvis, B. Skull, C. Femur, D. Humerus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a (Pelvis) Ref: KS Narayan, Reddy 21st ed, p. 55Pelvis is the bone best used for sex determination. There are many differences between male and female pelvis. Listed below are some of the important points. FEMALEMALEBuiltBones thinner, markings less prominentThicker, markings more prominentPelvis Inlet: Large circularCavity: Short cylindricalWalls: VerticalOutlet: Wide sub pubicangle (80-85)Short pubic crestsLong conicalLess verticalNarrow(50-60)IliumVertical bladesCurved bladesIschial tuberosityEvertedLess evertedPre and post auricular sulcusProminentLess prominentGreater sciatic notchWider, shallowDeep narrowObturator foramenSmall triangularOval and largerIschiopubic index-100-83', 'role': 'assistant'}]