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
Cataplexy is seen in - 
Select and explain. 
A. Catatonic schizophrenia, B. Narcolepsy, C. Chronic depression, D. Neuro - malignant syndrome
B: Narcolepsy
Answer: B: Narcolepsy 
Explanation: Cataplexy is the most common accessory symptom of Narcolepsy.