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: Medicine
Budd Chiari syndrome is: March 2013 
Select and explain. 
A. Poal vein thrombosis, B. Hepatic aery thrombosis, C. Cystic aery thrombosis, D. Hepatic vein thrombosis
D: Hepatic vein thrombosis
Answer: D: Hepatic vein thrombosis 
Explanation: Ans. D i.e. Hepatic vein obstruction