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
Which is not a second generation antihistamine 
Select and explain. 
A. Cyclizine, B. Fexofenadine, C. Loaratidine, D. Atorvalastine
A: Cyclizine
Answer: A: Cyclizine 
Explanation: Ans. is 'a' i.e. Cyclizine