This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organic mental disorders, Subject name: Psychiatry
Rivastigmine and Donepezil are drugs used predominantly in the management of 
Select and explain. 
A. Depression, B. Dissociation, C. Delusion, D. Dementia
D: Dementia
Answer: D: Dementia 
Explanation: In dementia, specific drug treatment such as cholinesterase inhibitors (e.g. donepezil, rivastigmine, galantamine) in moderate Alzheimer&;s disease, or memantine (NMDA antagonist) in moderate to severe Alzheimer's disease, can be helpful. Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no. 26