Question:easy
Preauricular sulcus is a part of?
Preauricular sulcus is a part of?
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This groove near the sacroiliac joint helps determine sex and is broader in females.
Updated On: Jun 24, 2026
- Humerus
- Femur
- Pelvis
- Skull
Show Solution
The Correct Option is C
Solution and Explanation
Step 1: We must locate which bone carries the preauricular sulcus.
Step 2: This sulcus is a shallow groove on the ilium, situated just below the auricular (ear-shaped) articular surface of the sacroiliac joint. It marks where the anterior sacroiliac ligament attaches. Anatomically, therefore, it belongs to the pelvis.
Step 3: In forensic anthropology the preauricular sulcus is a sex-determining marker. It is more common, wider and deeper in females because of the demands of pregnancy and childbirth on the female pelvis.
Step 4: No equivalent groove exists on the humerus, femur or skull, so the pelvis is the only correct answer.
\[\boxed{Pelvis}\]
Step 2: This sulcus is a shallow groove on the ilium, situated just below the auricular (ear-shaped) articular surface of the sacroiliac joint. It marks where the anterior sacroiliac ligament attaches. Anatomically, therefore, it belongs to the pelvis.
Step 3: In forensic anthropology the preauricular sulcus is a sex-determining marker. It is more common, wider and deeper in females because of the demands of pregnancy and childbirth on the female pelvis.
Step 4: No equivalent groove exists on the humerus, femur or skull, so the pelvis is the only correct answer.
\[\boxed{Pelvis}\]
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