Comprehensive and Detailed Step-by-Step Explanation:

Nasonexis anasal corticosteroidused to treatallergic rhinitis. Thegeneric name is mometasone furoate.

Explanation of Answer Choices:A. Mometasone furoateCorrect.Theactive ingredient in Nasonex.B. Loteprednol etabonate Incorrect.A corticosteroid, but used for eye inflammation.C. Desloratadine Incorrect.An antihistamine, not a steroid.D. Fluticasone Incorrect.Similar corticosteroid, but the generic for Flonase, not Nasonex.

Reference:

FDA Orange Book (Nasonex and Generics)

PTCB Exam: Generic & Brand Name Medications