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': 'Distribution of functional renal tissue is seen by \nSelect and explain. \nA. DMSA, B. DTPA, C. MAG3 - Tc 99, D. 1123 iodocholesterol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. DMSA', 'role': 'assistant'}]