This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
Absence seizures are characterized on EEG by 
Select and explain. 
A. 3 Hz spike and wave, B. 1-2 Hz spike and wave, C. Generalized poly spikes, D. Hypsarrythmia
A: 3 Hz spike and wave
Answer: A: 3 Hz spike and wave 
Explanation: EEG shows generalized, symmetric, 3-Hz spike-and-wave discharge that begins and ends suddenly, superimposed on a normal EEG background. Ref - Harrison's internal medicine 20e pg3051-3052, 3060f