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': "Which is the earliest site that get affected by Alzheimer's disease? \nSelect and explain. \nA. Amygdala, B. Nucleus basalis of mayernet, C. Red nucleus, D. Posterior commissurie", 'role': 'user'}, {'content': "Answer: B \nExplanation: Nucleus basalis of mayernet is the largest collection of cholinergic neuron in the brain.It is the earliest site to get affected by Alzheimer's disease.", 'role': 'assistant'}]