Question 3 of 30 During which stage of sleep are you in deep sleep , when it is tough to wake up? A. REM B. Stage 4 C. Stage 3 D. Stage 2

The correct answer is:<br /><br />B. Stage 4<br /><br />Stage 4 of sleep, also known as deep sleep or slow-wave sleep (SWS), is the stage during which it is most difficult to wake someone up. This stage is characterized by delta waves in the brain and is crucial for physical and mental restoration.