Anatomy In IVC obstruction, all of the following collaterals help EXCEPT: A Superior epigastric and inferior epigastric vein B Superficial epigastric and iliolumbar vein C Azygos and ascending lumbar vein D Lateral thoracic and preveebral vein 💡 Explanation In IVC obstruction, all of the following collaterals help EXCEPT: ✓ Correct Answer: B. Superficial epigastric and iliolumbar vein