This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
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: (Ref: KDT 6/e p409, 410) Gabapentin and progabide act by increasing the release of GABA. Gabapentin is the drug of choice for post-herpetic neuralgia and diabetic neuropathy.