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
Which of the following is not a 2nd generation antihistamine 
Select and explain. 
A. Cetrizine, B. Cyclizine, C. Loratidine, D. Fexofenadine
B: Cyclizine
Answer: B: Cyclizine 
Explanation: Ans. b. Cyclizine