This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hereditary Hyperbilirubinemia & Jaundice, Subject name: Medicine
Most common cause of obstructive jaundice in children? 
Select and explain. 
A. Biliary atresia, B. Criggler najjar syndrome, C. Byler disease, D. Caroli cyst
A: Biliary atresia
Answer: A: Biliary atresia 
Explanation: Biliary atresia: Biliary atresia is characterized by obliteration or discontinuity of the extrahepatic biliary system. The disorder represents the most common surgically treatable cause of cholestasis seen during the newborn period