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': 'Catastrophic reaction is a feature of- \nSelect and explain. \nA. Dementia, B. Schizophrenia, C. Delirium, D. Anxiety', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Catastrophic reaction is a feature of dementia.', 'role': 'assistant'}]