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
Prolonged use of one of the following anticonvulsant drugs can produce weight loss : 
Select and explain. 
A. Gabapentin, B. Oxcarbazepine, C. Topiramate, D. Valproic acid
C: Topiramate
Answer: C: Topiramate 
Explanation: None