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: Pathology
Drug of choice for trigeminal Neuralgia 
Select and explain. 
A. Carbamazepine, B. Valproate, C. Diazepam, D. Phenytoin
A: Carbamazepine
Answer: A: Carbamazepine 
Explanation: None