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
Buerger waves (alpha waves) of EEG have the rhythm per sec of - 
Select and explain. 
A. 0-4, B. 7-Apr, C. 13-Aug, D. 13-30
C: 13-Aug
Answer: C: 13-Aug 
Explanation: C i.e. 8-13