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: Medicine
[{'content': 'Which of the following EEG finding is charecteristic of absence seizures? \nSelect and explain. \nA. Hypsarrythmia, B. 1-2 Hz spike & wave, C. 3 Hz spike & wave, D. Generalized polyspikes', 'role': 'user'}, {'content': "Answer: C \nExplanation: The electroencephalogram (EEG) of absence seizures shows a characteristic 3Hz spike-and-wave pattern during the seizures. The spells of seizures are characterized by brief loss of consciousness without loss of postural tone. It is associated with eye blinking or a slight head turning. Several hundred such spells occur daily, leading to impaired school performance and social interactions. These spells are characteristically inducible by hyperventilation. Ref: Clinical Neurology By Roger P. Simon, 7th Edition, Chapter 8 ; Adams and Victor's Principles of Neurology By Allan H. Ropper, 9th Edition, Chapter 16", 'role': 'assistant'}]