Given the following information,which drug is most potent?

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The dose at which 50% of the response to the drug occurs is indicated in Figure 2-13 and is referred to as the ED₅₀,the dose of drug that produces 50% of the maximal effect.This may also be denoted as the EC₅₀,for effective concentration giving 50% of the maximal response.Potency refers to the concentration (EC₅₀)or dose (ED₅₀)of a drug producing 50% of that drug's maximal response.The potency of two drugs,A and B,can be compared on the basis of the ED₅₀ values of the two drugs: relative potency,A and B = ED₅₀ (B)/ED₅₀ (A).

Given the Following Information,which Drug Is Most Potent