This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
In a child, non-functioning kidney is best diagnosed by- 
Select and explain. 
A. Ultrasonography, B. VU, C. DTPA renogram, D. Creatinine clearance
C: DTPA renogram
Answer: C: DTPA renogram 
Explanation: DTPA/MAG3 Renogram. This procedure allows the physician to monitor the function of the kidneys and the degree of any blockage in the flow of urine out of the kidneys. You will lie down on the imaging couch and a Gamma Camera will be placed over your abdominal area Ref Harrison20th edition pg 297