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: Surgery
[{'content': "Cullen's sign - \nSelect and explain. \nA. Bluish disclolouration of the flanks, B. Bluish disclolouration of the flanks, C. Migratory thrombophelebitis, D. Subcutaneous fat necrosis", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Bluish discolouration in the umbilicus Cullen's sign - Bluish discoloration at the umbilicus Grey Turner's sign - Bluish discoloration at the flanks Ct. Mnemonic: GF (Girl Friend) Cullens --> Umbilicus Grey Turner's --> Flanks", 'role': 'assistant'}]