**Core Concept**
Pseudodementia refers to a reversible cognitive impairment that mimics dementia, often seen in patients with depression or other psychiatric disorders. This condition is characterized by a decline in cognitive function, including memory, attention, and executive skills, which can be improved with treatment of the underlying cause.

**Why the Correct Answer is Right**
Pseudodementia is typically seen in patients with depression, particularly in the elderly population. The cognitive impairment is thought to be a manifestation of the depressive disorder, rather than a neurodegenerative process. Studies have shown that a significant proportion of patients with pseudodementia have depressive symptoms, and improvement in depressive symptoms can lead to improvement in cognitive function.

**Why Each Wrong Option is Incorrect**
**Option A:** Not mentioned in the context of pseudodementia. While anxiety disorders can have cognitive symptoms, they are not typically associated with pseudodementia.
**Option B:** Although dementia with Lewy bodies is a neurodegenerative disorder with cognitive symptoms, it is not the primary cause of pseudodementia.
**Option C:** Schizophrenia can have cognitive symptoms, but it is not typically associated with pseudodementia.
**Option D:** Alzheimer's disease is a neurodegenerative disorder with cognitive symptoms, but it is not the primary cause of pseudodementia.

**Clinical Pearl / High-Yield Fact**
When evaluating patients with cognitive impairment, it is essential to consider psychiatric disorders, such as depression, as a potential underlying cause. A thorough psychiatric evaluation and treatment of depressive symptoms may lead to improvement in cognitive function.

**Correct Answer: D. Alzheimer's disease is a neurodegenerative disorder with cognitive symptoms, but it is not the primary cause of pseudodementia.**