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
Catastrophic reaction is feature of 
Select and explain. 
A. Dementia, B. Schizophrenia, C. Delirium, D. Anxiety
A: Dementia
Answer: A: Dementia 
Explanation: Dementia is a chronic organic mental disorder. A catastrophic reaction is seen in dementia when beyond confronted with an assignment which is beyond the residual intellectual capacity, patient may go into a sudden rage. (Ref: a sho textbook of psychiatry, Niraj Ahuja, 7th edition, pg no.22)