This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Psychiatry
True about delirium is all Except: 
Select and explain. 
A. Preserved attention, B. Disturbed sleep, C. Disorientation, D. Hallucination
A: Preserved attention
Answer: A: Preserved attention 
Explanation: Delirium Disturbance of consciousness with reduced ability to focus, sustain, or shift attention. perceptual disturbance, impaired cognition (memory deficit, disorientation) develops over a sho period of time (usually hours to days) and tends to fluctuate. Above disturbance develops as a consequence of medical condition, substance intoxication/ withdrawal Reference: P.324p.325 10.2 DeliriumKaplan & Sadock's Comprehensive Textbook of Psychiatry, 9th Ed