This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sleep disorders and eating disorders, Subject name: Psychiatry
Not true about narcolepsy 
Select and explain. 
A. Sudden sleep attack, B. Long duration (>3 hrs) of sleep, C. Cataplexy, D. Presents in 2nd decade
B: Long duration (>3 hrs) of sleep
Answer: B: Long duration (>3 hrs) of sleep 
Explanation: Classic form of Narcolepsy is characterised by Tetrad of symptoms- excessive day time sleepiness, cataplexsy, sleep paralysis and hypnogogic hallucinations. Sleep attacks leads to 10 to 20 minutes of sleep, after which patient feels refreshed, at least briefly. Ref: Synopsis of Psychiatry, 11e, pg 547.