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': 'Radiological finding in ileal atresia – a) Microcolon on Ba enemab) Double bubble signc) Coil spring appearance in Ba-Enemad) Obstruction in Ba meal \nSelect and explain. \nA. b, B. c, C. ad, D. ab', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Radiological features of ileal - atresia are multiple bubble sign (not double bubble), obstruction on barium meal, microcolon on barium meal, Apple-peel appearance.', 'role': 'assistant'}]