Question: Compute renal clearance of X given the following information: GFR = 100 mL/min, urine flow rate = 5 mL/min, plasma concentration of X = 10 mg/mL, urine concentration of X = 50 mg/mL.
Select one:
1. 50 mg/min
2. 25 mg/min
3. 4 mg/min
4. 50 mL/min
5. 25 mL/min