This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney & Ureturs, Subject name: Surgery
Stones that are common with infection is: 
Select and explain. 
A. Struvite, B. Xanthine stone, C. Cysteine stone, D. Calcium oxalate stones
A: Struvite
Answer: A: Struvite 
Explanation: Ans. (a) StruviteRef: Campbell Urology 1194* Struvite stones (Magnesium Ammonium Phosphate) occur only in association with urinary infection by urea -splitting bacteria. Proteus mirabilis the most common organism associated with infection.