This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Psychiatry
Which one of the following is NOT a feature of Delirium? 
Select and explain. 
A. Impairment of consciousness and attention, B. Global disturbance of cognition, C. Disturbance of sleep-wake cycle, D. Catastrophic reaction
D: Catastrophic reaction
Answer: D: Catastrophic reaction 
Explanation: (D) Catastrophic reaction # Characteristic features of Delirium: Acute Onset New memory registration & retention impaired Clouding of consciousness Disorientation in time, place & person Hallucination (often visual) Disturb sleep wake cycle, worsening of symptoms in evening and night (called sun downing) Psychomotor disturbance (Inform of hypo or hyperactivity.) Confusion (delirium was also k/a acute confusional state in past) Emotional disturbance> Only immediate and Recent memory is disturbed in Delirium. This leads to impairment in registration & Retention of new memories.> Memory loss means the memory that is already registered is lost (i.e. Remote memory will be lost) and clearly, This is preserved in delirium.> Sleep wake cycle is disturbed Paediatrics