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': 'Which one of the following is the most characteristic arrythmia with digitalis toxicity \nSelect and explain. \nA. Atrial fibrillation, B. Extrasystole, C. NPAT with block, D. Auricular flutter', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The classic features of digoxin toxicity are nausea, vomiting, abdominal pain, headache, dizziness, confusion, delirium, vision disturbance (blurred or yellow vision). It is also associated with cardiac disturbances including irregular heabeat, ventricular tachycardia, ventricular fibrillation, sinoatrial block and AV block Refer kDT 6/e p498', 'role': 'assistant'}]