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
Most common complication after ERCP is:- 
Select and explain. 
A. Acute pancreatitis, B. Acute cholangitis, C. Acute cholecystitis, D. Duodenal perforation
A: Acute pancreatitis
Answer: A: Acute pancreatitis 
Explanation: Complication of ERCP Complication: Pancreatitis, hemorrhage, cholangitis and perforation MC complication is acute pancreatitis Hemorrhage requires surgical intervention most commonly, sphincterotomy usually is conveed into formal surgical sphinteroplasty, which includes the bleeding aery Cholangitis is confined to patients in whom CBD clearance has not been achieved . Perforation may be asymptomatic and noticed only as retroperitoneal gas or extravasation of radiographic contrast material, but even in symptomatic patient, conservative treatment is often effective with spontaneous resolution and avoidance of potentially difficult surgery.