USMLE Step 1 Practice Questions - United States Medical Licensing Examination Step 1 Exam

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A patient with a history of alcohol abuse presents with neurological symptoms including ophthalmoplegia, ataxia, and confusion. Which vitamin deficiency is most likely responsible?

Vitamin B12 Thiamine (Vitamin B1) Folate Niacin

Correct Answer:

Thiamine (Vitamin B1)

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