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: Physiology
Alpha - wave in EEG is seen in - 
Select and explain. 
A. Sleep, B. REM sleep, C. Awake state, D. Mental work
C: Awake state
Answer: C: Awake state 
Explanation: C i.e. Awake