Anatomy In case of IVC obstruction the collaterals which open up are all except A Superior epigastric & inferior epigastric vein B Azygos & ascending lumbar vein C Superficial epigastric & iliolumbar vein D Lateral thoracic veins & preveebral vein 💡 Explanation In case of IVC obstruction the collaterals which open up are all except ✓ Correct Answer: C. Superficial epigastric & iliolumbar vein