This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Which of the following parameter signifies the effective drug removal from the body 
Select and explain. 
A. Clearance, B. Bioavailabilit, C. Safety, D. Volume of distrubtion
A: Clearance
Answer: A: Clearance 
Explanation: Ref-KDT 70e/30 Clearance of the drug is the theoretical volume of Plasma from which drug is removed from the body in unit time