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: Medicine
Alzheimer's disease, which is involved ? 
Select and explain. 
A. Frontal cortex, B. Cortical atrophy of temporoparietal cortex, C. Frontal and parietal cortex, D. Occipital cortex
B: Cortical atrophy of temporoparietal cortex
Answer: B: Cortical atrophy of temporoparietal cortex 
Explanation: None