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
Management of 5 cm size renal struvite calculus 
Select and explain. 
A. ESWL, B. PCNL, C. Retrograde intrarenal surgery, D. Open Pyelolithotomy
B: PCNL
Answer: B: PCNL 
Explanation: For stones which are

>2cm size
Hydronephrosis
Obstructed

PCNL is performed