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: Medicine
In pyelonephritis the diagnostic urinary finidng is - 
Select and explain. 
A. Pus cell cast, B. RBC cast, C. Pus cells, D. RBCs
A: Pus cell cast
Answer: A: Pus cell cast 
Explanation: None