This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
Rivastigmine is given in: 
Select and explain. 
A. Depression, B. Alzheimer's disease, C. Schizophrenia, D. OCD
B: Alzheimer's disease
Answer: B: Alzheimer's disease 
Explanation: (Ref: Katzung, 10th ed. Ch 7)* Rivastigmine is a parasympathomimetic drug used for the treatment of mild to moderate dementia of the Alzheimer's type and dementia due to Parkinson's disease* DOC for Alzheimer's disorder-Donepezil* DOC for OCD: Fluoxetine* DOC for parkinsonism: Levodpa + Carbidopa* DOC for drug induced parkinsonism: Benzhexol (centrally acting anticholinergic)