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: Pathology
[{'content': "The nucleus involved in Alzheimer's disease is - \nSelect and explain. \nA. Basal nucleus of Mayernet, B. Raphe nucleus, C. Superior salivary nucleus, D. Basal lobe of cerebellum", 'role': 'user'}, {'content': "Answer: A \nExplanation: Alzheimer disease \n\nAlzheimer disease (AD) is the most common cause of dementia in the elderly.\nAlzheimer's disease is associated with a decrease in cerebral cortical levels of Acetylcholine.\nReduction of Acetylcholine is related to degeneration of cholinergic neurons that project to many areas of cortex.\nThis degeneration occurs in the nucleus basalis of Mayernet.", 'role': 'assistant'}]