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: Surgery
A pt. presents with hematuria of several days and dysmorphic RBC casts in urine. The site of origin is - 
Select and explain. 
A. Kidney, B. Ureter, C. Bladder, D. Urethra
A: Kidney
Answer: A: Kidney 
Explanation: None