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
Which drug is specific MAO - B inhibitor? 
Select and explain. 
A. Seleginile, B. Phenelzine, C. Tranylcypromine, D. Haloperidol
A: Seleginile
Answer: A: Seleginile 
Explanation: Ans. is. a'i.e., SelegilineNonselective = Tranylcypromine,phenelzine, isocarboxazid.Selective MAO-A = Moclobemide, clorgyline (used in depression).Selective MAO-B = Selegiline (used in parkinsonism).