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: Pathology
Muddy brown casts are seen in 
Select and explain. 
A. Chronic renal failure, B. Acute tubular necrosis, C. Nephrotic syndrome, D. Nephritic syndrome
B: Acute tubular necrosis
Answer: B: Acute tubular necrosis 
Explanation: Muddy brown casts made up of epithelial cells are pathognomonic for Acute tubular necrosis.