This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pharmacology, Subject name: Pharmacology
A bolus of drug K is given IV. The drug is noted to follow first order kinetics. Which of the following describe the elimination of drug K 
Select and explain. 
A. The rate of elimination of drug K is propoional to its concentration in the patient's plasma., B. The rate of elimination of drug K is dependent on a nonlinear relationship to the plasma protein concentration., C. The rate of elimination of drug K is constant., D. The rate of elimination of drug K is propoional to the patient's renal function.
A: The rate of elimination of drug K is propoional to its concentration in the patient's plasma.
Answer: A: The rate of elimination of drug K is propoional to its concentration in the patient's plasma. 
Explanation: First-order kinetics means the rate of elimination of a drug is propoional to the plasma concentration. Ref:- KD Tripathi