A forensic anthropologist examines a pelvis from skeletal remains to determine biological sex. Which single pelvic feature provides the HIGHEST degree of sexual dimorphism and accuracy in sex determination?

• A Pubic symphysis height
• B Sacral index
• C Acetabular diameter
• D Greater sciatic notch angle ✓

Explanation

The greater sciatic notch is the single most reliable skeletal indicator of sex: it is wide (>90°) in females (to allow passage of the fetal head) and narrow (<60°) in males. Its accuracy for sex determination approaches 90% in experienced hands. Pubic symphysis height and acetabular diameter are secondary features. The sacral index (width/length × 100) shows female sacra being broader and shorter, but is less reliable alone.

Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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