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: Surgery
[{'content': 'In newborn the most common cause of intestinal obstruction is \nSelect and explain. \nA. Annular pancreas, B. Esophageal atresia, C. Duodenal atresia, D. Jejunal atresia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]