This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal Radiography, Subject name: Radiology
[{'content': 'Colon cut off sign is seen in? \nSelect and explain. \nA. Carcinoma colon, B. Pancreatitis, C. Sigmoid valvulus, D. Diverticulosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) PancreatitisRef: Wofganag5th e p. 846/748y Blueprints Radiology 2e- p 55', 'role': 'assistant'}]