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14319 Surgery

A 60 years old man presents with acute onset of pain in lower abdomen followed by repeated rectal bledding Examination revealed pulse rate of 100/ minute, BP 160/96 mm of Hg and a localised tenderness in the left hypochondrium. Stools examination reveales only a few pus cells and sigmoidoscopy was normal. Which one of the following is the most likely diagnos –

AIdiopathic ulcerative colitis
BBacillary dysentery
CIschaemic colitis
DAmoebic colitis
Surgery
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