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': 'All of the following antihistaminic agents lack anticholinergic property EXCEPT : \nSelect and explain. \nA. Promethazine, B. Astemizole, C. Levocetirizine, D. Loratadine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All the drugs listed in the question are second generation anti-histaminic agents except promethazine.', 'role': 'assistant'}]