<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:An 81-year-old man is brought to the physician by his daughter after he was found wandering on the street. For the last 3 months, he often has a blank stare for several minutes. He also claims to have seen strangers in the house on several occasions who were not present. He has hypertension and hyperlipidemia, and was diagnosed with Parkinson disease 8 months ago. His current medications include carbidopa-levodopa, hydrochlorothiazide, and atorvastatin. His blood pressure is 15085 mm Hg. He has short-term memory deficits and appears confused and disheveled. Examination shows bilateral muscle rigidity and resting tremor in his upper extremities. He has a slow gait with short steps. Microscopic examination of the cortex of a patient with the same condition is shown. Which of the following is the most likely diagnosis?? A: Lewy body dementia, B: Creutzfeldt-Jakob disease, C: Vascular dementia, D: Normal pressure hydrocephalus, E: Frontotemporal dementia,  <response>: This is a clinical vignette describing an elderly man with progressive cognitive impairment, visual hallucinations, parkinsonian features like rigidity, tremor and gait abnormalities. The image shows Lewy bodies in the cortex, which are abnormal protein aggregates seen in Lewy body dementia. The symptoms and findings are classic for Lewy body dementia, which commonly presents with cognitive fluctuations, visual hallucinations, and parkinsonian motor features. Creutzfeldt-Jakob disease would show spongiform changes on cortical biopsy, not Lewy bodies. Vascular dementia would not explain the hallucinations and parkinsonism. Normal pressure hydrocephalus may cause gait issues but not the other findings. Frontotemporal dementia also does not explain the full constellation of symptoms.A: Lewy body dementia 