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: Surgery
[{'content': 'Which of the following factors in bile juice is responsible for preventing the precipitation of cholesterol and formation of gallstones- \nSelect and explain. \nA. High alkaline condition, B. High concentration of bicarbonates, C. Bile salts, D. Bile pigments', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]