This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'The gold standard for the definitive diagnosis of the extrahepatic biliary atresia is \nSelect and explain. \nA. Per operative cholangiography, B. Hepatobiliary scintigraphy, C. Alkaline phosphatase level, D. Liver biopsy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Biliary atresia Evaluation of biliary anatomy begins with ultrasound Other imaging modalities such as HIDA scintigraphy, MRCP and ERCP have been used with varying success Although these are useful adjuncts, liver biopsy is gold standard for the diagnosis of biliary atresia and can safely be done percutaneously under local anaesthesia Ref: Sabiston 20th edition Pgno : 639', 'role': 'assistant'}]