This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sleep Physiology, Subject name: Physiology
The EEG rhythm having lowest frequency is- 
Select and explain. 
A. Alpha, B. Beta, C. Delta, D. Theta
C: Delta
Answer: C: Delta 
Explanation: Ans. C. DeltaThe various types of EEG waveforms are depicted below-