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
Bluish discoloration of flank is known as: 
Select and explain. 
A. Grey turner sign, B. Cullen sign, C. Trousseau sign, D. None
A: Grey turner sign
Answer: A: Grey turner sign 
Explanation: Ans. (a) Grey Turner signRef: Sabiston 20th edition Page 1526* Flank discoloration -- Grey turner* Peri umbilical -- Cullen sign* Inguinal -- Fox sign