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 are ECG findings in Wolf Parkinson's white syndrome, except - \nSelect and explain. \nA. Narrow QRS complexes, B. Normal QT interval, C. Slurred and tall QRS, D. Short PR interval", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]