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': 'Which of the following drug used against glaucoma is contraindicated in patients with urine retention \nSelect and explain. \nA. Disopyramide, B. Flecainide, C. Lidocanine, D. Tocainide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Class Ia Antiarrhythmics have anticholinergic property. Disopyramide is a class Ia antiarrhythmic with maximum anticholinergic action & hence contraindicated in patients with urine retention & glaucoma.', 'role': 'assistant'}]