This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'Which of the following is seen in torsades de pointes \nSelect and explain. \nA. Hypermagnesemia, B. Sho QRS complex, C. Prolonged QTc interval, D. PQ segment', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Torsades de pointes is a complication of prolonged ventricular repolarisation(prolonged QT interval. QT interval >0.44sec in men, >0.46sec in women. Reference: Harrison 20th edition pg 1445', 'role': 'assistant'}]