This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous System, Subject name: Pediatrics
[{'content': 'Landau-Kleffner syndrome is characterized by all of following except \nSelect and explain. \nA. Seizure, B. Loss of language skill, C. Normal EEG during sleep, D. Normal brain CT scan', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. Normal EEG during sleep Ref : Nelson Textbook of Pediatrics 20th/ed p2837ExplanationLandau-Kleffner syndrome is a condition of unknown cause characterized by:# Loss of language skills attributed to auditory agnosia in a previously normal child# Seizures (focal, generalized tonic-clonic, atypical absence, partial complex, and, occasionally, myoclonic seizures).# High-amplitude spike-and-wave discharges ON EEG which are always more apparent during non-rapid eye movement sleep; thus, a child in whom Landau-Kleffner syndrome is suspected should have an EEG during sleep, particularly if the awake record is normal.# CT and MRI studies typically yield normal results.', 'role': 'assistant'}]