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 an anti histaminic drug of the ethanolamine group? 
Select and explain. 
A. Clemastine, B. Diphenhydramine, C. Dimenhydrinate, D. Chlorpheniramine
D: Chlorpheniramine
Answer: D: Chlorpheniramine 
Explanation: Ans. is d i.e., Chlorpheniramine Ethanolamine derivative group of antihistaminics are: Carbinoxamine maleate Clemastinefumarate Diphenhydrmine HC1 Dimenhydrinate