This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
Rate of elimination of a new drug is 20mg/hr it is steady state plasma concentration of 10mg/L, then it's renal clearance will be 
Select and explain. 
A. 0.5L/hr, B. 2.0L/hr, C. 5.0L/hr, D. 20L/hr
B: 2.0L/hr
Answer: B: 2.0L/hr 
Explanation: Ref-Katzung 10/e p35 Clearance=Rate of elimination/plasma concentration 20mg/hr /10mg/L =2L/hr