This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Substance Related and Addictive Disorders, Subject name: Psychiatry
Korsakoff syndrome true is/are: 
Select and explain. 
A. Can be seen in chronic alcoholics, B. Absence of intellectual decline, C. Chronic amnestic syndrome, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Korsakoff syndrome is due to thiamine deficiency. Apa from alcoholism, malnutrition can also cause it. Korsakoff syndrome Chronic neurological complication of long term alcohol use a. Amnesia - Anterograde(m/c) > retrograde b. Learning difficulties c. Confabulations Rx = vitamin B1 oral (Thiamine) for 3 to 12 months * only 20% recover with treatment.