Paper 3 has been removed from NET from 2018 (Notification)- now paper 2 and 3 syllabus is included in paper 2. Practice both paper 2 and 3 from past papers.

CBSE NET Percussion Instruments Paper 2 Sep 2016: Free and Fast Download of PDF

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Numerous fully-solved CBSE-NET Hindustani Music Paper-II questions (including prior year problems) with detailed illustrated explanations: practice and you won't miss a single question in real exam.