Stage 3 has slow wave EEG and REM has alpha waves. Sorry, not right. Stage three does indeed have slow wave EEG, but REM does not have alpha wave. Alpha waves are seen in people in an awake but relaxed state. Question 2 - Option A 2.
Sleep is a condition in which the mind is completely at rest and is shut off from the outside world.
Sorry, not right. This is too strong a statement for all stages of sleep and very far from correct for early sleep stages. Question 2 - Option B 2. Sleep is a state in which there is limited response to external stimuli and a variety of brain activities. This description captures the change of consciousness point and the complex stages of sleep.