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: 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: Answer- B. Budd Chiari SyndromeCauses of congestive splenomegalyBudd Chiari SyndromeHepatic vein obstructionPoal vein obstruction', 'role': 'assistant'}]