This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'Mechanism of action of donepezil is: \nSelect and explain. \nA. Centrally acting reversible anticholinesterase, B. Centrally acting irreversible anticholinesterase, C. Irreversible cholinergic action, D. Reversible anticholinesterase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: donepezil is a centrally acting anti cholinesterase which is reversible.other drugs in this category include rivastigmine Ref; KD Tripathi 8th ed.', 'role': 'assistant'}]