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: Surgery
All are true foe annular pancreas except 
Select and explain. 
A. Upper GI series is IOC, B. Duodenal obstruction present, C. ERCP is done, D. Non - rotation of gut
A: Upper GI series is IOC
Answer: A: Upper GI series is IOC 
Explanation: upper GI series is not the investigation of choice.They are plain X-ray abdomen,ERCP and Radioscopic study , Barium meal. SRB,5th,712