This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
Obstruction of IVC leads to 
Select and explain. 
A. Dilatation of thoracoepigastric veins, B. Caput medusae, C. Hemorrhoids, D. Esophageal varices
A: Dilatation of thoracoepigastric veins
Answer: A: Dilatation of thoracoepigastric veins 
Explanation: .