Question:
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
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The Correct Option is C
Solution and Explanation
Step 1: The preauricular sulcus is a groove found on the ilium of the pelvic bone, just below and in front of the auricular surface of the sacroiliac joint.
Step 2: It lies at the site of attachment of the anterior (ventral) sacroiliac ligament. Hence anatomically it is a part of the pelvis, making option c correct.
Step 3: The preauricular sulcus is an important feature in forensic sex determination of skeletal remains. It is more frequent, broader and deeper in the female pelvis, reflecting the adaptations of the female pelvis for childbirth.
Step 4: The humerus, femur and skull do not bear a preauricular sulcus, so options a, b and d are incorrect.
Step 2: It lies at the site of attachment of the anterior (ventral) sacroiliac ligament. Hence anatomically it is a part of the pelvis, making option c correct.
Step 3: The preauricular sulcus is an important feature in forensic sex determination of skeletal remains. It is more frequent, broader and deeper in the female pelvis, reflecting the adaptations of the female pelvis for childbirth.
Step 4: The humerus, femur and skull do not bear a preauricular sulcus, so options a, b and d are incorrect.
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