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: Medicine
[{'content': 'The normal capacity of the gallbladder is: \nSelect and explain. \nA. 100 ml of bile, B. 10 ml of bile, C. 30 ml of bile, D. 250 ml of bile', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The normal capacity of the gallbladder is 30 mL of bile. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 2616', 'role': 'assistant'}]