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
Sleepwalking occur in which stage of sleep - 
Select and explain. 
A. REM, B. NREM stage, C. NREM stage 3 or 4, D. Can occur in any stage of NREM sleep
C: NREM stage 3 or 4
Answer: C: NREM stage 3 or 4 
Explanation: Sleep walking (somnambulism) is seen in stage 3 & 4 of NREM sleep.