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': 'What is diagnostic of fresh myocardial infarction 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: Answer is C (ST segment elevation)', 'role': 'assistant'}]