This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
In case of IVC obstruction, the collateral which opens up are all except 
Select and explain. 
A. Superior epigastric & inferior epigastric vein, B. Azygos& ascending lumbar vein, C. Superficial epigastric & ileolumbar vein, D. Lateral thoracic veins & preveebral vein
C: Superficial epigastric & ileolumbar vein
Answer: C: Superficial epigastric & ileolumbar vein 
Explanation: Superficial epigastric vein drains into the femoral vein&ileo lumbar vein drains into common iliac vein Ref: Gray's 39e/p10