This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Psychiatric Illness, Subject name: Pharmacology
Drug of choice for treatment of Alzhiemer's disease is: 
Select and explain. 
A. Donepezil, B. Atropine, C. Physostigmine, D. Fluoxetine
A: Donepezil
Answer: A: Donepezil 
Explanation: Drug of choice for treatment of Alzhiemer's disease is: Donepezil Atropine is DOC for organophosphate poisoning Physostigmine is DOC for atropine poisoning Fluoxetine is DOC for depression AcHE inhibiting drugs Donepezil Rivastigmine Galantamine