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
An antiepileptic drug 'A' can also be used for the treatment of post–herpetic neuralgia and pain due to diabetic neuropathy. Which of the following can be the agent 'A' ? 
Select and explain. 
A. Carbamazepine, B. Gabapentin, C. Lamotrigine, D. Primidone
B: Gabapentin
Answer: B: Gabapentin 
Explanation: None