<prompt> Which about the following is false about narcolepsy?Sleep suddenPresents in 2nd decadeCataplexyLoss of muscle tone  <response>: Ans. B. Present in 2nd decadeNarcolepsy: Excessive daytime sleepiness, Cataplexy, Hypnagogic or hypnopompic hallucinations, sleep paralysis.Can occur at any age, although most commonly in adolescence or early adulthood, usually before 30 years 