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: Radiology
Radiological signs of acute pancreatitis include the following except - 
Select and explain. 
A. Colon cut-off sign, B. Cullen's sign, C. Renal halo sign, D. Sentinel loop sign
B: Cullen's sign
Answer: B: Cullen's sign 
Explanation: All the given signs are present in acute pancreatitis. However, Cullen's sign is a clinical sign (not radiological sign).