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': 'Use of tiotropium is contraindicated in - \nSelect and explain. \nA. Bronchial asthma, B. Hypeension, C. Urinary retention, D. Peptic ulcer disease', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Urinary retention o Tiotropium is an antimuscarinic drug and it should be avoided in patients with history of prostatic hyperplasia (urinary retention) --> by antagonising the action of Ach in bladder it relaxes detrusor and stimulate trigone urinary retention.", 'role': 'assistant'}]