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
Drug preferred in generalized tonic clonic seizure: 
Select and explain. 
A. Phenytoin, B. Na+ Valproate, C. Carbamazepine, D. Diazepam
B: Na+ Valproate
Answer: B: Na+ Valproate 
Explanation: (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.