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
The nucleus involved in Alzheimer's disease is - 
Select and explain. 
A. Basal nucleus of Mayernet, B. Raphe nucleus, C. Superior salivary nucleus, D. Basal lobe of cerebellum
A: Basal nucleus of Mayernet
Answer: A: Basal nucleus of Mayernet 
Explanation: Alzheimer disease 

Alzheimer disease (AD) is the most common cause of dementia in the elderly.
Alzheimer's disease is associated with a decrease in cerebral cortical levels of Acetylcholine.
Reduction of Acetylcholine is related to degeneration of cholinergic neurons that project to many areas of cortex.
This degeneration occurs in the nucleus basalis of Mayernet.