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 non-sedating antiallergic drug? 
Select and explain. 
A. Cetrizine, B. Astemizole, C. Terfenadine, D. Triprolidine
D: Triprolidine
Answer: D: Triprolidine 
Explanation: Ans. is 'd' i.e., Triprolidine o Second generation antihistaminics have no CNS depressant action (sedation, diminished aleness) o Cetrizine, astemizole and terfenadine are second generation antihistaminics. o Triprolidine is first generation antihistaminic with mild sedative propey.