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': 'All are second generation antihistaminic except - \nSelect and explain. \nA. Acrivastin, B. Cyclizine, C. Fexofenadine, D. Loratidine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Cyclizine o Cyclizine is first generation antihistaminic. o Second generation antihistaminics are terfendine, fexofenadine, loratadine, desloratadine, cetrizine, astemizole, levocetrizine, azelastine, mizolastine, ebstine, rupatadine and acrivastin.", 'role': 'assistant'}]