This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmias 1, Subject name: Medicine
Comment on the diagnosis from the ECG shown below: 
Select and explain. 
A. RCA occlusion by thrombus, B. LAD occlusion by thrombus, C. LCX occlusion by thrombus, D. Aefact
A: RCA occlusion by thrombus
Answer: A: RCA occlusion by thrombus 
Explanation: ECG shows a hea rate of 100/min with ST elevation in lead II, III , aVF and V4R. Indicates inferior wall MI and occlusion of Right coronary aery.