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
All of the following are used for secondary prevention of MI except? 
Select and explain. 
A. Aspirin, B. Statins, C. Beta-blockers, D. Warfarin
D: Warfarin
Answer: D: Warfarin 
Explanation: Aspirin and clopidogrel have been shown to reduce moality due to MI. Statins regress atherosclerosis and b blockers which have an oxygen conserving action will prevent future episode of MI. Warfarin is not routinely used in post-MI patients.