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': 'True about mesenteric vein thrombosis - \nSelect and explain. \nA. Peritoneal signs are always present, B. Invariably involves long length of bowel, C. I.V. Heparin is the treatment of choice, D. Surgery can lead to short-bowel syndrome', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Peritoneal signs are present in less than half the cases.\nAny length of bowel may be involved depending on the level and extent of thrombosis.\nResection of the nonviable bowel along with its, mesentry is the treatment of choice. Heparin is given in all cases and along with bowel rest and fluid resuscitation is sufficient in patients without bowel infarction.\nWhen extensive resection is done, short bowel syndrome can occur.', 'role': 'assistant'}]