
Answer the Step 1 question(s) below, select one answer from the multiple choices below then get the correct answer by clicking on get answer button.
Question:
A 57-year-old man has crushing substernal chest pain for several hours. Upon admission to the emergency department, physicians diagnose him with acute myocardial infarction. Subsequent testing in the coronary care unit reveals that this patient has significant hyperhomocysteinemia, which may have contributed to his infarction. Chronic administration of which of the following will lower his serum homocysteine levels and possibly reduce his risk of subsequent infarcts?

