Which of the following features is characteristic of Neurofibromatosis Type 1 (NF1)?

A 50-year-old male presents with sudden onset vertigo, nausea, vomiting, and hearing loss in his right ear. On examination, he exhibits horizontal nystagmus with the fast phase beating towards the unaffected ear. Which of the following is the most likely diagnosis?

Which cognitive symptom is typically seen in frontotemporal dementia?

Which of the following is a characteristic feature of Alzheimer's disease, the most common cause of dementia?

Which type of dementia is characterized by prominent fluctuations in cognitive function, visual hallucinations, and parkinsonism? 

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