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: Surgery
Obstruction of the hepatic vein by thrombosis or a web is 
Select and explain. 
A. Schatzki's ring, B. Plummer Vinson Syndrome, C. Budd-Chiari syndrome, D. Caroli's disease
C: Budd-Chiari syndrome
Answer: C: Budd-Chiari syndrome 
Explanation: Budd Chiari syndrome is a syndrome or group of disorders caused by occlusion of major hepatic veins or IVC or both at or near the level of the hepatic vein, usually three main major hepatic veins are involved by thrombosis or block. Reference: SRB 5th edition page no 626