This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Drugs used in GTCS is/are: a) Ethosuximide b) Sodium–valproate c) Lamotrigine d) Propofol 
Select and explain. 
A. bc, B. ab, C. ad, D. cd
A: bc
Answer: A: bc 
Explanation: None