This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
Not seen in Narcolepsy: 
Select and explain. 
A. Sleep paralysis, B. Sleep attack, C. Catalepsy, D. Cataplexy
C: Catalepsy
Answer: C: Catalepsy 
Explanation: Narcolepsy is characterized by Cataplexy (loss of muscle tone) not Catalepsy.
Catalepsy or catatonia is akinetic mutism & stupor seen in severe depression, schizophrenia.
Remember: Two lepsy's can not be together, Catalepsy is not seen in Narcolepsy.