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: Medicine
[{'content': 'All the following are used in a patient with decreased renal function (reduced GFR) in order to avoid contrast nephropathy except \nSelect and explain. \nA. N-acetyl cysteine, B. Mannitol, C. Fenoldopam, D. Low osmolar contrast media (LOCM)', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]