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': 'False about annular pancreas \nSelect and explain. \nA. Associated with down syndrome, B. Bilious vomiting, C. Treatment is duodeno-duodenostomy, D. Diagnosis is by ERCP', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Non bilious voimiting is seen in annular pancreas.', 'role': 'assistant'}]