<prompt> Narcolepsy is?Sleep walkingSleeptalkingIncreased day time sleepSleep terrors  <response>: Ans. is c i.e., Increased day time sleep Narcolepsy This is characterized by excessive day time sleep, often disturbed night time sleep and decreased in the REM sleep. Age of onset is between 10-20 years. There is irresistible desire to sleep and bouts of sudden sleep each lasting for 10-30 minutes occurring during day time. In majority of cases narcolepsy is associated with one or more accessory symptoms : -i Cataplexy: - It is the most common accessory symptom and is characterized by sudden decrease in muscle tone, either, local or generalized.ii Hypnagogic hallucination: - Hallucination occurring just before falling.iii Sleep paralysis least common Treatment of narcolepsy includes stimulant medications methyphenidate, amphetamines or modafinil. 