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
[{'content': 'Treatment of choice for annular pancreas is \nSelect and explain. \nA. Duodenoduodenostomy, B. Gastrojejunostomy, C. Vagotomy, D. Billroth type II gastrectomy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Duodenoduodenostomy "The usual treatment is bypass (duodenoduodenostomy)" -- Bailey and Love"Retrocolicduodenojejunostomy is the procedure of choice." -- Harrison"Treatment usually involves bypass, through duodenojejunostomy, rather than resection." -- Sabiston"The surgical treatment of choice for duodenal obstruction due to duodenal stenosis or atresia or annularpancreas is a duodenoduodenostomy." -- Schwartz 9/e', 'role': 'assistant'}]