This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organic mental disorders, Subject name: Psychiatry
[{'content': 'Not a feature of dementia \nSelect and explain. \nA. Forgetfulness, B. Loss of neurons in brain, C. Loss of sensorium, D. Wearing diy clothes', 'role': 'user'}, {'content': "Answer: C \nExplanation: Dementia refers to a disease process marked by progressive cognitive impairment in clear consciousness. Reference: Kaplan & Sadock's synopsis of psychiatry, 11th edition, page 704.", 'role': 'assistant'}]