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': 'True about quinidine is/are: \nSelect and explain. \nA. It increases effective refractory period, B. Causes paradoxical tachycardia, C. Cinchonism is seen, D. All of these', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]