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
[{'content': 'In Budd Chiari syndrome, the site of venous thrombosis is : \nSelect and explain. \nA. Infrahepatic inferior vena cava, B. Infrarenal inferior vena cava, C. Hepatic veins, D. Poal veins', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer is C (Hepatic vein): Budd chiari syndrome is characterized by post sinusoidal obstruction outside the liver at the level of hepatic veins', 'role': 'assistant'}]