This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute coronary syndrome, Subject name: Medicine
On the basis of given ECG what is the most probable diagnosis ? 
Select and explain. 
A. Anterolateral wall MI, B. Anteroseptal MI, C. Anterior wall MI, D. Extensive anterior wall MI
B: Anteroseptal MI
Answer: B: Anteroseptal MI 
Explanation: The given ECG shows ST elevation in leads V1-V4 which suggest acute anteroseptal wall MI. Acute septal MI is associated with ST elevation, Q wave formation and T wave inversion in the leads overlying the septal region of the hea (V2 and V3).