This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
GFR is best measured with which of the following? 
Select and explain. 
A. Iodohippurate, B. Tc99m-DTPA, C. Tc99m-MAG3, D. Tc99m-DMSA
C: Tc99m-MAG3
Answer: C: Tc99m-MAG3 
Explanation: Tc-99m MAG3 (mercaptoacetyltriglycine) is one of the technetium radiopharmaceuticals used in renal imaging. ... excretion: renal both glomerular filtration and tubular excretion; Ref ganong's review of medical physiology 25e