This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
[{'content': 'Bilious vomiting is seen in all except: \nSelect and explain. \nA. Jejunal atresia, B. Volvulus of small intestine, C. Duodenal atresia, D. Pyloric stenosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: d (Pyloric stenosis)Ref: Bailey & Love, 24th ed, p. 1033 & 23rd ed, p. 899', 'role': 'assistant'}]