Which of the following statement about mesenteric vein thrombosis is TRUE?

Option 1 Peritoneal signs are present in less than half the cases. Option 2 Any length of bowel may be involved depending on the level and extent of thrombosis. Option 3 Resection of the nonble bowel along with its mesentery is the treatment of choice. heparin is given in all cases and along with bowel rest and fluid resuscitation is sufficient in patient without bowel infarction. Option 4 When extensive resection is done, sho bowel syndrome can occur Ref: Schwaz 9/e, Page 1006; Maingot's 10/e, Page 672; CSDT 13/e, Page 641.