The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 78-year-old man is brought to the physician by his daughter because of increasing forgetfulness over the past 5 weeks. He had been living independently but came to live with his daughter temporarily after he complained that he was unable to perform some of his daily activities. He has left the front door wide open and tap water running on multiple occasions. He does not sleep well and wakes up 6–7 times during the night. He does not leave his room and rarely makes conversation with his daughter. He says that he used to enjoy playing the piano but has not played for several months. He has hypertension treated with amlodipine. Vital signs are within normal limits. Mental status examination shows orientation to person, place, and time and psychomotor retardation. He has a blunted affect. Short- and long-term memory is impaired. Attention and concentration are impaired. Neurologic examination shows no focal findings. Serum concentration of electrolytes, thyroid-stimulating hormone, and vitamin B12 are within the reference range. He is very concerned about his memory lapses. Which of the following is the most appropriate treatment for this patient?   (A) Fluoxetine   (B) Aspirin   (C) Ventriculoperitoneal shunt   (D) Memantine
['(A) Fluoxetine <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Fluoxetine \n (B) Aspirin \n (C) Ventriculoperitoneal shunt \n (D) Memantine <> possible answers', '  A 78-year-old man is brought to the physician by his daughter because of increasing forgetfulness over the past 5 weeks. He had been living independently but came to live with his daughter temporarily after he complained that he was unable to perform some of his daily activities. He has left the front door wide open and tap water running on multiple occasions. He does not sleep well and wakes up 6–7 times during the night. He does not leave his room and rarely makes conversation with his daughter. He says that he used to enjoy playing the piano but has not played for several months. He has hypertension treated with amlodipine. Vital signs are within normal limits. Mental status examination shows orientation to person, place, and time and psychomotor retardation. He has a blunted affect. Short- and long-term memory is impaired. Attention and concentration are impaired. Neurologic examination shows no focal findings. Serum concentration of electrolytes, thyroid-stimulating hormone, and vitamin B12 are within the reference range. He is very concerned about his memory lapses. Which of the following is the most appropriate treatment for this patient? <> context@']