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: Pharmacology
[{'content': 'All are cholinergic agents except - \nSelect and explain. \nA. Galantamine, B. Donepezil, C. Tacrine, D. Memantine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Memantine Cognition Enhancers (Cerebroactive drugs) o These are a heterogenous group of drugs developed for use in dementia and other cerebral disorders. o Drugs are 1. Cholinergic activaters --> Tacrine, Rivastigmine, Donepezil, Galantamine. 2. Glutamate (NMDA) antagonist --4 Memanite 3. Miscellaneous --> Piracetam, Pyritinal (pyrithioxine), Piribedil, Dihydroergotoxine (Codergocrine).", 'role': 'assistant'}]