This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nephrotic and Nephritic syndrome, Subject name: Medicine
Salt losing nephritis is: 
Select and explain. 
A. Interstitial nephritis, B. Polycystic Kidney, C. Lupus nephritis, D. R.P.G.N
A: Interstitial nephritis
Answer: A: Interstitial nephritis 
Explanation: Most of the salt excreted from the body is reabsorbed proximal convoluted tubule and hence in interstitial nephritis where the tubule is involved, the salt loss will be seen.