This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
[{'content': 'Characteristic feature of subcoical dementia is \nSelect and explain. \nA. Memory loss, B. Aphasia, C. Dyslexia, D. Tactile agnosia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Memory loss Aphasia, Agnosia, Dyslexia are characteristic features of coical dementia. So we are only left with memory loss for sub coical dementia.', 'role': 'assistant'}]