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: Radiology
The gold standard method for detection of renal scarring in patient with recurrent urinary tract infection is: 
Select and explain. 
A. 99 Tc- DMSA scan, B. 99 Tc-DTPA scan, C. 99Tc-MIBG Scan, D. 99Tc-MDP scan
A: 99 Tc- DMSA scan
Answer: A: 99 Tc- DMSA scan 
Explanation: A i.e. 99 Tc- DMSA scan