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: Anatomy
Grey Turner's sign (Flank discolouration) is seen in 
Select and explain. 
A. Acute pyelonephritis, B. Acute cholecystitis, C. Acute pancreatitis, D. Acute peritonitis
C: Acute pancreatitis
Answer: C: Acute pancreatitis 
Explanation: Signs indicative of retroperitoneal bleeding in severe pancreatitis Flank ecchymosis - Grey Turner sign Periumbilical ecchymosis- Cullen's sign Inguinal ecchymosis - Fox sign Ref: Sabiston 20th edition Pgno : 1527