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
The predominant constituent of the pale yellow gall stones in the gall bladder is - 
Select and explain. 
A. Mucin glycoprotein, B. Calcium carbonate, C. Cholesterol, D. Calcium phosphate
C: Cholesterol
Answer: C: Cholesterol 
Explanation: None