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
[{'content': "All of the following are Anticholinesteroses used in Alzheimer's disease except \nSelect and explain. \nA. Rivastimine, B. Galantamine, C. Memantine, D. Donepezil", 'role': 'user'}, {'content': "Answer: C \nExplanation: Memantine is used to treat Alzeihmer's disease but it is not an anticholinesterase.It acts by blocking NMDA receptors.", 'role': 'assistant'}]