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': 'Athletic syndrome is characterized by - \nSelect and explain. \nA. Increased amplitude of QRS, B. Tachycardia, C. Decreased QT interval, D. U-waves', 'role': 'user'}, {'content': 'Answer: A \nExplanation: increased amplitude of QRS complex is a feature of athletes hea they have bradycardia decreased QT interval and U waves are not seen Ref Harrison 20th edition pg 1435', 'role': 'assistant'}]