The pelvis is considered the most reliable bone for determining sex in an adult skeleton because:

• A It is the largest bone and easiest to identify
• B It undergoes minimal postmortem changes
• C It contains the most abundant bone marrow for DNA analysis
• D It shows the greatest sexual dimorphism due to obstetric requirements ✓

Explanation

The pelvis is the most reliable indicator of sex in skeletal remains with an accuracy of up to 95%. The female pelvis is shaped to accommodate childbirth and shows distinct features: wider sub-pubic angle (>90°), oval pelvic inlet, wider sciatic notch, and a less angular pubic arch. These differences are the direct result of obstetric selection pressure, making sexual dimorphism most pronounced here.

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

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.