Final answer:
The Orange Book provides information on therapeutic equivalence of drugs. Option AB represents therapeutic equivalence.
Step-by-step explanation:
The Orange Book is a publication by the U.S. Food and Drug Administration (FDA) that provides information on drug products approved for safety and effectiveness. The ratings in the Orange Book indicate the therapeutic equivalence between brand and generic drugs.
Among the given options, the rating that represents therapeutic equivalence is AB. This means that the FDA has determined that the brand and generic drug have been shown to be therapeutically equivalent, meaning they have the same active ingredients, strength, dosage form, and route of administration.