This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': "Grey Turner's sign (flank discoloration) is seen in \nSelect and explain. \nA. Acute pylonephritis, B. Acute cholecystisis, C. Acute pancreatitis, D. Acute peritonitis", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sign seen due to enzyme seep across etroperitoneum causing hemorrhagic spots and ecchymosis in the flanks SRB,5th,683.', 'role': 'assistant'}]