This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: A.N.S., Subject name: Pharmacology
[{'content': 'All of the following drugs are used for the treatment of urinary incontinence except: \nSelect and explain. \nA. Oxybutynin, B. Ipratropium, C. Darifenacin, D. Tolterodine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B) Ipratropium(Ref: Katzung 10/e p115; KDT 8th/e p129)Ipratropium is an anticholinergic drug which is used for the treatment of COPD and bronchial asthma.', 'role': 'assistant'}]