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
[{'content': 'WBC cast is seen in ? \nSelect and explain. \nA. Pyelonephritis, B. Glomerulonephritis, C. Chronic renal failure, D. Hyaline cast', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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', 'role': 'assistant'}]