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 one of the follwing is the ECG hallmark of hypothermia- \nSelect and explain. \nA. Prominent U wave, B. Inveed T wave, C. Bizarre QRS wave, D. Osborne J wave', 'role': 'user'}, {'content': 'Answer: D \nExplanation: ECG Changes in Hypothermia Hypothermia may produce the following ECG abnormalities: Bradyarrhythmias (see below) Osborne Waves (= J waves) Prolonged PR, QRS and QT intervals Shivering aefact Ventricular ectopic Cardiac arrest due to VT, VF or asystole Ref Harrison 20th edition pg 1445', 'role': 'assistant'}]