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': 'Better prognostic factor for operation of biliary duct obstruction in newborn are -a) No passage of bileb) Size of ductule > 200 micronc) Weight of baby > 3 kgd) Preterm babye) Age of 8 weeks \nSelect and explain. \nA. ab, B. be, C. bc, D. ce', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]