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 Hi blocker has high anticholinergic activity- 
Select and explain. 
A. Cetrizine, B. Chlorpheniramine, C. Fexofenadine, D. Astemizole
B: Chlorpheniramine
Answer: B: Chlorpheniramine 
Explanation: Ans. is 'b' i.e., Chlorpheniramine First generation antihistaminics have anticholinergic propey. Among the given options, only chlorpheniramine is first generation compound.