This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fundamentals in Radiology, Subject name: Radiology
Radiocontrast is contraindicated in all except - 
Select and explain. 
A. Renal failure, B. Patient on metformin, C. Dehydration, D. Obesity
D: Obesity
Answer: D: Obesity 
Explanation: Impoant risk factors for contrast induced nephropathy (CIN) : Renal failure Diabetes Hypeension Dehydration Patient on metformin Hyperuricemia