This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sleep disorders and eating disorders, Subject name: Psychiatry
True about REM sleep is 
Select and explain. 
A. Night mares, B. Night terror, C. Somniloquy, D. None
A: Night mares
Answer: A: Night mares 
Explanation: ParasomniasParasomnias are dysfunctions or episodic nocturnal events occurring with sleep, sleep stages or paial arousals. Most parasomnias are common in childhood though they may persist into adulthood.Stage 4 Sleep Disorders:These disorders occur during deep sleep, i.e. Stages 3 and 4 of NREM-sleep.Nightmares (which occur during REM sleep) are clearly remembered in the morning. Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no. 140