This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology and abdominal wall layer, Subject name: Anatomy
[{'content': 'The simple columnar or cuboidal epithelium lining the extrahepatic biliary ducts is derived from \nSelect and explain. \nA. Mesoderm, B. Endoderm, C. Ectoderm, D. Neuroectoderm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: liver gall bladder and biliary apparatus develop from an endodermal diveiculum that arises from ventral aspect of terminal forgut The epithelium lining the extrahepatic biliary ducts is derived from endoderm. The intrahepatic biliary ducts are also derived from endoderm.', 'role': 'assistant'}]