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': 'All of the following are the electrocardiographic features of Hyperkalemia, except - \nSelect and explain. \nA. Prolonged PR interval, B. Prolonged QT interval, C. Sine wave patterns, D. Loss of P waves', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]