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: Medicine
In medically intractable seizures, which of the following modalities of treatment has shown the best seizure-free period? 
Select and explain. 
A. Epileptic surgery, B. Deep brain stimulation, C. Vagal stimulation, D. Ketogenic diet
A: Epileptic surgery
Answer: A: Epileptic surgery 
Explanation: Ans. a. Epileptic surgery (Ref Harrison l9/e p2556. I8/e p3267; Ketogenic diet for epilepsy by R Levy, P Cooper - Cochrune Database Syst Rev, 2003 - Wiley Online Library)Epileptic surgery:Surgery can be extremely effective in substantially reducing seizure frequency and even providing complete seizure control.