This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
An alcoholic presents with complaints of loss of memory of recent events, impaired insight, confabulation, and dementia of few months duration. The patient is suffering from : 
Select and explain. 
A. Wernicke's encephalopathy, B. Korsakoff's psychosis, C. Delirium tremens, D. Binswanger's disease
B: Korsakoff's psychosis
Answer: B: Korsakoff's psychosis 
Explanation: Loss of memory (amnesia) and confabulation in an alcoholic suggest the diagnosis of Korsakoff's psychosis.