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
Renal stone which is formed due to proteus infection is? 
Select and explain. 
A. Calcium oxalate, B. Uric acid, C. Cystine, D. Struvite
D: Struvite
Answer: D: Struvite 
Explanation: Ans. (d) StruviteRef::Robbiris 8thed Table 20-12, Sabiston Textbook of Surgery, 18thed chapter 77,