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': "Cullen's sign: \nSelect and explain. \nA. Bluish discolouration of the flanks, B. Bluish discolouration in the umbilicus, C. Migratory thrombophelebitis, D. Subcutaneous fat necrosis", 'role': 'user'}, {'content': "Answer: B \nExplanation: (Bluish discolouration in the umbilicus) (1124-Baily & love 24th) (1140-Baily & Love 25th)Acute Pancratitis* Bluish discolouration of the flanks - Grey Turner Sign* Bluish discolouration of the umbilicus - Cullen's sign.", 'role': 'assistant'}]