This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'The following antiarrhythmic drug has the most prominent anticholinergic action \nSelect and explain. \nA. Quinidine, B. Lignocaine, C. Disopyramide, D. Procainamide', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Disopyramide It is a quinidine like Class IA drug that has prominent cardiac depressant and anticholinergic actions, but no a adrenergic blocking propey. Disopyramide usually has no effect on sinus rate because of opposing direct depressant and antivagal actions. Ref:- kd tripathi; pg num:-530', 'role': 'assistant'}]