This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Histaminics, Subject name: Pharmacology
[{'content': 'Which is not a second generation antihistamine \nSelect and explain. \nA. Cyclizine, B. Fexofenadine, C. Loaratidine, D. Atorvalastine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Cyclizine", 'role': 'assistant'}]