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': 'What is the diagnostic of fresh myocardial infraction in ECG \nSelect and explain. \nA. QT interval prolongation, B. P mitrale, C. ST segment elevation, D. ST segment depression', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref Harrison 19 th ed pg 1594 addition to the clinical examination, three major noninvasive tools are used in the evaluation of NSTEMI-ACS: the electrocardiogram (ECG), cardiac biomarkers, and stress testing.', 'role': 'assistant'}]