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: Pharmacology
[{'content': 'Drug preferred in generalized tonic clonic seizure: \nSelect and explain. \nA. Phenytoin, B. Na+ Valproate, C. Carbamazepine, D. Diazepam', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (Ref: Katzung, 14th ed. pg. 426; KDT 6th ed. pg. 407-408)* Given the choices the answer will be Na+ Valproate* According to Harrisons 19th ed. the current recommendable drug of choice for GTCS is LAMOTRIGINE > Na+ Valproate.', 'role': 'assistant'}]