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: Pediatrics
[{'content': 'Anewborn infant presents with bilious vomiting and epigastric distention immediately following bih. What is the most likely diagnosis? \nSelect and explain. \nA. Esophageal atresia, B. Congenital pyloric stenosis, C. Gastric outlet obstruction, D. Atresia of 3rd pa of duodenum', 'role': 'user'}, {'content': 'Answer: D \nExplanation: This infant is suffering from duodenal atresia. Postnatal abdominal Xray in this case shows double bubble sign. It is associated with other congenital anomalies such as esophageal atresia, intestinal atresia, cardiac and renal anomalies. It is also seen in association with prematurity and Downs syndrome.', 'role': 'assistant'}]