<prompt> Which drug is specific MAO - B inhibitor?SeleginilePhenelzineTranylcypromineHaloperidol  <response>: Ans. is. ai.e., SelegilineNonselective Tranylcypromine,phenelzine, isocarboxazid.Selective MAO-A Moclobemide, clorgyline used in depression.Selective MAO-B Selegiline used in parkinsonism. 