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
[{'content': 'Zero order kinetics means \nSelect and explain. \nA. A constant amount of drug is eliminated per unit time, B. A constant fraction of the drug in the body is eliminated per unit time, C. The fraction of the administrative dose that reaches the systematic circulation, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Zero order of kinetics means a constant amount of drug is eliminated per unit time Ref -KDT 6/e p31', 'role': 'assistant'}]