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: Radiology
Colon cut off sign is seen in 
Select and explain. 
A. Acute pancreatitis, B. Chronic pancreatitis, C. Pancreatic carcinoma, D. Ulcerative colitis
A: Acute pancreatitis
Answer: A: Acute pancreatitis 
Explanation: Colon cut off sign - Distension of the colon upto the transverse colon with a paucity of gas distal to splenic flexure - seen in Acute pancreatitis.