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 anti–arrythmic drug decreases the action potential duration in purkinje fibers ? \nSelect and explain. \nA. Quinidine, B. Flecainide, C. Amiodarone, D. Lignocaine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]