This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
Salt loosing nephropathy is seen in - 
Select and explain. 
A. Tubulointerstial disease, B. Interstitial glomerulonephritis, C. Analgesic abuse, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Ans. is 'd' i.e., All the above Salt losing nephropathy* It is a clinical state rather than a specific disease.* It is normally associated with chronic kidney disease due to tubulointerstitial disease or due to glomerulonephritis due to significant interstitial abnormalities.* A common example of toxic nephropathy inducing salt loosing nephropathy state is analgesic abuse.* It usually occurs when the GFR is less than 15ml/min.