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
[{'content': "A kinetic analysis of the effect of a drug on an enzyme's activity was performed, results as below. The drug would be best fit into which of the following group? \nSelect and explain. \nA. A competitive inhibitor, B. A noncompetitive inhibitor, C. An uncompetitive inhibitor, D. A competitive activator of the enzyme", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. A noncompetitive inhibitora. Analysis of the data indicates that in the presence of the inhibitor, the Km of the enzyme is the same as in the absence of the inhibitor, but the Vmax is significantly reduced (the extrapolated lines intersect on the x-axis).b. These characteristics are the hallmark of noncompetitive inhibition.', 'role': 'assistant'}]