This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which of the following antihistamine can be used topically in allergic rhinitis? 
Select and explain. 
A. Terfenadine, B. Azelastine, C. Cetrizine, D. Fexofenadine
B: Azelastine
Answer: B: Azelastine 
Explanation: Azelastine, Astemizole, Ketotifen, Olopatadine are the antihistaminics that can be used topically in allergic rhinitis and conjuctivitis.