This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
Which of the following drug can prevent or delay the onset of Alzheimer disease? 
Select and explain. 
A. Tacrine, B. NSAID, C. Donepezil, D. None of the above
B: NSAID
Answer: B: NSAID 
Explanation: Following drugs have been shown to prevent or delay Alzheimer's disease. a. Estrogen replacement therapy b. NSAID c. Selegiline Tacrine and donepezil are used in the treatment of Alzheimer's disease.