This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urolithiasis, Subject name: Surgery
Stag horn calculi associated with Proteus infection are: 
Select and explain. 
A. Uric acid stones, B. Triple phosphate stones, C. Calcium oxalate stones, D. Cystine stones
B: Triple phosphate stones
Answer: B: Triple phosphate stones 
Explanation: Ans. (b) Triple phosphate stonesRef : Bailey & Love 26th ed. Ch 75/1292