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': 'Catastrophic reaction is feature of: \nSelect and explain. \nA. Dementia, B. Delirium, C. Schizophrenia, D. Anxiety', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Catastrophic reaction: is a feature of dementia may result in an emotional outburst in a patient of dementia when he gets aware about his intellectual deficits in a stressful situation.', 'role': 'assistant'}]