This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
[{'content': 'Second generation antihistamines used in allergic rhinitis are except \nSelect and explain. \nA. Azelastine, B. Fexofenadine, C. Chlorpheneramine maleate, D. Desloratidine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Chlorpheniramine and promethazine are first generation antihistamines. Refer kDT 6/e p158', 'role': 'assistant'}]