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
Which is the earliest site that get affected by Alzheimer's disease? 
Select and explain. 
A. Amygdala, B. Nucleus basalis of mayernet, C. Red nucleus, D. Posterior commissurie
B: Nucleus basalis of mayernet
Answer: B: Nucleus basalis of mayernet 
Explanation: 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.