Which of the following is effective when given once daily for the prevention of epilepsy.. Phenytoin - Epanutin

Which of the following is effective when given once daily for the prevention of epilepsy
A) Carbamazepine (Tegretol)
B) Sodium valproate (Epilim)
C) Phenytoin (Epanutin)***
D) Carbamazepine (Tegretol Retard).