**Core Concept**
Alzheimer's disease is a progressive neurodegenerative disorder characterized by cognitive decline, memory loss, and neuronal damage. It is primarily associated with the accumulation of amyloid beta plaques and tau protein tangles in the brain, leading to neuronal dysfunction and death.

**Why the Correct Answer is Right**
Alzheimer's disease is characterized by several key features, including cognitive decline, memory loss, language difficulties, and motor function impairment. The disease is also associated with the loss of cholinergic neurons in the basal forebrain, which can be targeted with cholinesterase inhibitors to improve symptoms. Additionally, Alzheimer's disease is often accompanied by the deposition of amyloid beta plaques and tau protein tangles in the brain, which are a hallmark of the disease.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Alzheimer's disease is indeed associated with cognitive decline and memory loss.
**Option B:** This option is incorrect because Alzheimer's disease is indeed characterized by the deposition of amyloid beta plaques and tau protein tangles in the brain.
**Option C:** This option is incorrect because Alzheimer's disease is indeed associated with the loss of cholinergic neurons in the basal forebrain.

**Clinical Pearl / High-Yield Fact**
A key feature of Alzheimer's disease is the loss of synapses and neurons in the hippocampus, which is critical for memory formation and retrieval. This loss can be visualized on imaging studies such as MRI and PET scans, which can help diagnose the disease.

**Correct Answer: A.**