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 Hi blocker has high anticholinergic activity- \nSelect and explain. \nA. Cetrizine, B. Chlorpheniramine, C. Fexofenadine, D. Astemizole', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Chlorpheniramine First generation antihistaminics have anticholinergic propey. Among the given options, only chlorpheniramine is first generation compound.", 'role': 'assistant'}]