This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastro Intestinal System, Subject name: Pediatrics
[{'content': 'Post-hepatic Portal Hypertension is caused by: \nSelect and explain. \nA. Portal vein thrombosis, B. Banti syndrome, C. Budd-Chiari syndrome, D. Congenital hepatic fibrosis', 'role': 'user'}, {'content': "Answer: C \nExplanation: C. Budd-Chiari Syndrome(Ref: Nelson's 20/e p 1973, Ghai 8/e p 320)Postsinusoidal causes of Portal hypertension include: Budd-Chiari syndrome and Veno-occlusive disease.", 'role': 'assistant'}]