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
Progressive cognitive impairment in Alzheimer's disease is characterized by - 
Select and explain. 
A. Nominal aphasia, B. Recent memory loss, C. No behavioral abnormalities, D. All
B: Recent memory loss
Answer: B: Recent memory loss 
Explanation: Alzheimer's disease is characterized by early impairment of recent memory.