<prompt> About first order kinetics,true statement isClearance remains constantFixed amount of drug is eliminatedHalf life increases with doseDecreases clearance with increased dose  <response>: Clearance is variable in zero-order kinetics because a constant amount of the drug is eliminated per unit time, but it is constant in first-order kinetics, because the amount of drug eliminated per unit time changes with the concentration of drug in the blood Ref-KDT 6e p32 