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
True statement about Korsakoff's psychosis is - 
Select and explain. 
A. Severe antegrade + Mild retrograde memory defect, B. Mild antegrade + severe retrograde memory defect, C. Only antegrade memory defect, D. Only retrograde memory defect
A: Severe antegrade + Mild retrograde memory defect
Answer: A: Severe antegrade + Mild retrograde memory defect 
Explanation: Korsakoff syndrome has sever antegrade amnesia and less severe retrograde amnesia.