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': 'Bile is concentrated in the gallbladder to _______ times \nSelect and explain. \nA. 5, B. 10, C. 20, D. 50', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Functions of Gallbladder Reservoir of bile Concentration of bile 5-10 times Secretion of mucus, 20ml/day by tubuloalveolar glands Acidification of bile Ref: Sabiston 20th edition Pgno :1482', 'role': 'assistant'}]