This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
[{'content': 'A 40 year old male presented with severe epigastric pain radiating to back. O/E- HR is 110/min, RR- 22/min & BP- 100/70mmHg. His abdominal X-ray is shown below which depicts: \nSelect and explain. \nA. Sentinel loop sign, B. Colon cut-off sign, C. Renal halo sign, D. Obliteration of psoas shadow', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The given X ray shows Colon cut-off sign- abrupt termination of gas filling of thecolonat the level of the left flexure Seen in acute pancreatitis Other radiological signs seen in acute pancreatitis: Sentinel loop sign Renal halo sign Gasless abdomen', 'role': 'assistant'}]