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
[{'content': 'Second generation antihistaminics used in allergic rhinitis are : \nSelect and explain. \nA. Azelastine, B. Fexofenadine, C. Desloratadine, D. All of these', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Chlorpheniramine and promethazine are first generation antihistaminics.', 'role': 'assistant'}]