<prompt> Rate of elimination of drug is:ClearanceTl2BiotransformationBioavailability  <response>: Ans: A Clearance Ref: Basic Clinical Pharmacology, Katzung 12th ed. P.38Explanation:Clearance of a drug is the factor that predicts the rate of elimination in relation to the drug concentrationClearance rate of eliminationplasma concentrationBiotransformation: It is a chemical modification or modifications made by human body on a chemical compound.Drug biotransformations have 2 classical reactions: Phase I and Phase II. See the following figureBioavailability: It is the fraction of administered drug that reaches the systemic circulation. Bioavailability is expressed as the fraction of administered drug that gains access to the systemic circulation in a chemically unchanged form. 