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: Anatomy
[{'content': 'Cell lining of common bile duct is ? \nSelect and explain. \nA. Stritified Columnar, B. Stratified squamous, C. Simple cuboidal, D. Simple columnar', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Simple columnar Gall bladder and common bile ducts are lined by simple columnar epithelium.", 'role': 'assistant'}]