This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contrast Agents, Subject name: Radiology
[{'content': 'Contrast induced nephropathy defined as: \nSelect and explain. \nA. Rise in Serum Creatinine by 0.5 mg in 48 hours, B. Rise in Serum Creatinine by 1 mg in 48 hours, C. Rise in Serum Creatinine by 1.5 mg in 48 hours, D. Rise in Serum Creatinine by 2 mg in 48 hours', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Contrast Induced nephropathy: Rise in Serum Creatinine by 0.5 mg in 48 hours or 25% from baseline within 48-72 hours from IV Contrast. Most impoant step in Management of Contrast Induced nephropathy: HYDRATION.', 'role': 'assistant'}]