Answer: d. Donepezil
Step-by-step explanation:
Alzheimer is a brain disorder. It destroys the memory as well as thinking skills. The person looses ability to perform simplest tasks. This disorder appears in mid-60s.
Donepezil is the agent which can be used for the treatment of Alzheimer disease. It helps in improving the memory, and awareness. It restores the functioning of the neurotransmitters in the brain.