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
Subcapsular nephrectomy is indicated is 
Select and explain. 
A. Perinephric abscess, B. Hydronephrosis, C. Pyonephrosis, D. PCKD
C: Pyonephrosis
Answer: C: Pyonephrosis 
Explanation: None