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: Pharmacology
A 70 kg man was given a drug with dose of 100 mg/ kg bd. wt. t'/2 is 10 hours, plasma conc" is 1.9 mg/ml clearance is - 
Select and explain. 
A. 0-02 liter/hr, B. 20 liter/hr, C. K is 0.0693, D. 0.22 L/hr
D: 0.22 L/hr
Answer: D: 0.22 L/hr 
Explanation: Ans. is 'd' i.e., 0.22 L/hr