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: Medicine
[{'content': 'A patient develops sudden palpitation with HR 150/ min, regular. What could be the cause \nSelect and explain. \nA. PSVT, B. Sinus tachycardia, C. Ventricular tachycardia, D. Atrial flutter with block', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]