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': 'Bluish discoloration of flank is known as: \nSelect and explain. \nA. Grey turner sign, B. Cullen sign, C. Trousseau sign, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Grey Turner signRef: Sabiston 20th edition Page 1526* Flank discoloration -- Grey turner* Peri umbilical -- Cullen sign* Inguinal -- Fox sign', 'role': 'assistant'}]