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
[{'content': 'Which of the following is not an anti histaminic drug of the ethanolamine group? \nSelect and explain. \nA. Clemastine, B. Diphenhydramine, C. Dimenhydrinate, D. Chlorpheniramine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is d i.e., Chlorpheniramine Ethanolamine derivative group of antihistaminics are: Carbinoxamine maleate Clemastinefumarate Diphenhydrmine HC1 Dimenhydrinate', 'role': 'assistant'}]