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
Best screening method for Mirizzi syndrome is: 
Select and explain. 
A. USG abdomen, B. CECT abdomen, C. Plain X-Ray abdomen, D. ERCP
D: ERCP
Answer: D: ERCP 
Explanation: Mirizzi syndrome: Suspected cases should be examined with ultrasonography or CT for anatomical evaluation to avoid biliary injury or postoperative biliary leakage related to undetected fistula formation. ERCP has been recommended as the best screening method. Ref: Turk J Gastroenterol 2008; 19 (4): 258-263.