Question: A 76-year-old widowed, retired history professor comes to the clinic with his daughter to seek help for his memory difficulties, which started about 3 years ago and have progressed gradually. He stopped driving 6 months ago after being involved in a car accident. He recently moved in with his daughter, and she has been taking him to appointments, managing his finances, and attending to his care. A recent brain CT scan shows cortical atrophy and ventricular enlargement. His TSH and B12 levels are normal. His daughter starts crying while reporting that he has had many verbal disagreements with her. Lately, he has been accusing her of controlling him and becomes very agitated. What is the likely diagnosis? Group of answer choices Major neurocognitive disorder due to Alzheimer's disease Major neurocognitive disorder with Lewy bodies Intermittent explosive disorder Delirium