This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
WBC cast is seen in ? 
Select and explain. 
A. Pyelonephritis, B. Glomerulonephritis, C. Chronic renal failure, D. Hyaline cast
A: Pyelonephritis
Answer: A: Pyelonephritis 
Explanation: Ans. (a) PyelonephritisCauses of WBC castsCauses of RBC Casts* Acute pyelonephritis* Interstitial nephritis* Lupus nephritis* Acute Glomerulonephritis* Goodpasture Syndrome* Lupus nephritis* Renal infarction* Right sided heart failure* Renal vein thrombosis* Polyarteritis Nodosa