This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
'Obstruction of Inferior vena cava' presents - 
Select and explain. 
A. Paraumbilical dilatation, B. Thoracoepigastric dilatation, C. Oesophageal varices, D. Haemorrhoids
B: Thoracoepigastric dilatation
Answer: B: Thoracoepigastric dilatation 
Explanation: Obstruction of inferior vena cava presents as thoracoepigastric dilatation because the vessels involved are the superficial veins, namely, superficial epigastric, lateral thoracic, thoracoepigastric.