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
The investigation of choice for renal scarring defect in kidney: 
Select and explain. 
A. DMSA scan, B. DTPA scan., C. Dexa scan, D. MCU
A: DMSA scan
Answer: A: DMSA scan 
Explanation: Ans. (a) DMSA scanRef: Bailey 26th Edition, Pages 1276-1277* IOC for Renal Structure scarring - DMSA* IOC for Congenital PUJ obstruction - DTPA