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: Radiology
[{'content': 'Double Bubble sign on abdominal skiagram is suggestive of: March 2005 \nSelect and explain. \nA. Ileal atresia, B. Anorectal malformation, C. Bladder calculi, D. Duodenal Atresia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D: Duodenal Atresia Plain films are useful in assessing the level of the obstruction. Air-fluid levels in the stomach and duodenum (double-bubble sign), an impoant finding of acute duodenal obstruction, can also be seen on plain films.', 'role': 'assistant'}]