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
What is diagnostic of fresh myocardial infarction In ECG- 
Select and explain. 
A. QT interval prolongation, B. Pmitrale, C. ST segment elevation, D. ST segment depression
C: ST segment elevation
Answer: C: ST segment elevation 
Explanation: Ref: R Alagappan - Manual of Practical Medicine 4th Edition.pg no:184 ECG * May be normal initially and hence serial ECGs must be taken. * ST elevation and T-wave inversion with pathological Q-waves are typically seen in leads adjacent to the infarcted segment of myocardium. * Reciprocal ST depression or T-wave inversion in opposite leads. * A non-Q-wave infarct may occur and has a high risk of moality (as they are prone to develop dangerous arrhythmias and recurrent angina).