<prompt> Wigabatrin a new antiepileptic agent acts by ?GABA- antagonisGABA - agonismNMDA antagonismCarbonic anhydrase inhibition  <response>: Ans is b i.e., GABA-agonism o Vigabatrin y-vinyl GABA is an inhibitor of GABA transaminase, the enzyme which degrades GABA. o Anticonvulsant action is due to increase synaptic GABA concentration. 