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. Paraumblical dilatation, B. Thoraco-epigastric dilatation, C. Oesophagus varies, D. Haemorrhoides
B: Thoraco-epigastric dilatation
Answer: B: Thoraco-epigastric dilatation 
Explanation: B i.e. Thoraco-epigastric dilation