Which is the most common type of dementia?

Correct answer is D). Alzheimer's disease is the leading cause of dementia worldwide, accounting for the majority of dementia cases. It is a progressive neurological disorder characterized by the accumulation of abnormal protein deposits in the brain, leading to cognitive decline, memory loss, and changes in behavior and thinking. Vascular dementia, Lewy body dementia, and Frontotemporal dementia are also types of dementia, but they are less common than Alzheimer's disease.