This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'First line treatment of generalized onset tonic-clonic seizures is \nSelect and explain. \nA. Lamotrigine, B. Phenytoin, C. Levetiracetam, D. Ethosuximide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: First line antiepilepticsGeneralized- Onset Tonic-ClonicLamotrigineValproic acidFocalLamotrigineCarbamazepineOxcarbazepinePhenytoinLevetiracetamTypical AbsenceValproic acidEthosuximideLamotrigineAtypical Absence, Myoclonic, AtonicValproic acidLamotrigineTopiramateRef: Harrison 19e 2552', 'role': 'assistant'}]