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: Pharmacology
[{'content': 'Which is a treatment of juvenile myoclonic epilepsy in pregnancy? \nSelect and explain. \nA. Levetiracetam, B. Carbamazepine, C. Vigabatrin, D. Phenytoin', 'role': 'user'}, {'content': "Answer: A \nExplanation: A unique anticonvulsant which suppresses kindled seizures but is ineffective against rna'-'electroshock or PTZ. Clinical efficacy has been sh,,*. -adjuvant medication in refractory paial seizure,; or without secondary generalization. None of the __ anticonvulsant mechanisms of action appear applicable to levetiracetarn. Ref KD Tripati 8th ed.", 'role': 'assistant'}]