Noor has episodes in which she experiences a sudden and irresistible urge to sleep during normal waking periods.Which disorder does Noor most likely suffer from

A)  hypersomnia 
B)  insomnia 
C)  a lack of REM rebound 
D)  narcolepsy

Narcolepsy

A long-standing disorder that causes significant daytime fatigue and sudden onset of sleep.

Irresistible Urge

A compelling, often uncontrollable desire to perform an act, frequently associated with obsessive-compulsive disorder.

Episodes

Events or sequences of events that are significant enough to be remembered or notable in a narrative or series.