This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gall Bladder & Bile Ducts, Subject name: Surgery
Gall stones are composed of all except: 
Select and explain. 
A. Oxalates, B. Bile salts, C. Cholesterol, D. Bile pigments
A: Oxalates
Answer: A: Oxalates 
Explanation: Ans: a (Oxalates)Ref: Bailey & Love, 24thed, p. 1103 & 23rd ed, p. 974