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
[{'content': 'Impared Renal Function is assessed by \nSelect and explain. \nA. MAG3, B. IodoHippurate, C. DMSA Scan, D. DTPA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. MAG3', 'role': 'assistant'}]