This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal Radiography, Subject name: Radiology
[{'content': 'Double bubble sign is seen in? \nSelect and explain. \nA. Duodenal atresia, B. Pyloric stenosis, C. Jejunal obstruction, D. Ileal obstruction', 'role': 'user'}, {'content': "Answer: A \nExplanation: ANSWER: (A) Duodenal atresiaREF: Bailey and love 24(tm) ed p. 1199, Nelson's pediatrics 17th ed p. 1234Double bubble sign is seen inLadds bands, malrotationAnnular pancreasDuodenal atresia, stenosis, web, duplication, obstruction", 'role': 'assistant'}]