This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal Tubular Disease, Subject name: Medicine
Salt losing nephritis is a feature of: 
Select and explain. 
A. Interstitial nephritis, B. Polycystic kidney, C. Lupus nephritis, D. Renal amyloidosis
A: Interstitial nephritis
Answer: A: Interstitial nephritis 
Explanation: Ans. is 'a' interstitial nephritis One of the important functional consequence of interstitial nephritis is salt wasting.Interstitial nephritis is caused by drugs such as methicillin* or penicillin*It is a type of tubulointerstitial disease in which there is tubular degeneration and necrosis and marked inflammation of interstitium.