This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Liver, Subject name: Surgery
[{'content': 'In Budd chiari syndrome the occlusion is at the: \nSelect and explain. \nA. IVC, B. Renal vein, C. Hepatic vein, D. Splenic vein', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans: c (Hepatic vein)Ref: Bailey & Love, 24th ed, p. 1074 & 23rd ed, p. 943', 'role': 'assistant'}]