Chronic Alcoholic with memory loss...

 A chronic alcoholic develops severe memory loss with marked confabulation. Deficiency of which of the following vitamins would be most likely to contribute to the neurologic damage underlying these symptoms?

A. Folic acid
B. Niacin
C. Riboflavin
D. Thiamine
E. Vitamin B12

A 45 year male with a history of alcohol dependence presents with confusion, nystagmus and ataxia. Examination reveals 6th cranial nerve weakness. He is most likely to be suffering from:

 A 45 year male with a history of alcohol dependence presents with confusion, nystagmus and ataxia. Examination reveals 6th cranial nerve weakness. He is most likely to be suffering from:
1. Korsakoff’s psychosis.
2. Wernicke’s encephalopathy.
3. De Clerambault syndrome.
4. Delirium tremens.