This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'Ipratropium bromide is absolutely contraindicated in \nSelect and explain. \nA. Asthma, B. Urinary retention, C. Peptic ulcer, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Anticholinergic drugs have relaxant action on ureter and urinary bladder; leading to urinary retention in older males with prostatic hyperophy. However, the same can be beneficial in neurogenic bladder enuresis.', 'role': 'assistant'}]