This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Liver), Subject name: Surgery
[{'content': "Cause of congestive splenomegaly is - \nSelect and explain. \nA. Visceral Leishmaniasis, B. Budd Chiari Syndrome, C. Gaucher's Disease, D. Hodgkin's Lymphoma", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Budd Chiari Syndrome Causes of congestive splenomegalyo Budd Chiari Syndromeo Hepatic vein obstruction\\o Portal vein obstruction", 'role': 'assistant'}]