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: Surgery
Which of the following factors in bile juice is responsible for preventing the precipitation of cholesterol and formation of gallstones 
Select and explain. 
A. High alkaline condition, B. High concentration of bicarbonates, C. Bile salts, D. Bile pigments
C: Bile salts
Answer: C: Bile salts 
Explanation: Bile salts (salts of cholic & chenodeoxycholic acids)form micelle which makes cholesterol soluble and prevents formation of gallstones