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
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 
Select and explain. 
A. ab, B. be, C. bc, D. ce
B: be
Answer: B: be 
Explanation: None