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
[{'content': 'A 65 years old male presented to a hospital with focal seizures. His renal function was normal. Which of the following is the drug of choice for this patient ? \nSelect and explain. \nA. Valproate, B. Pregabalin, C. Levetiracetam, D. Oxcarbazepine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]