KBC 2021| Which instrument is playing in this audio? Find the correct answer of this question-Which instrument is playing in this audio? By Monishka Kapoor - September 9, 2021 KBC 2021, The options for the question – Which instrument is playing in this audio? 1-Dilruba 2-Akkordean 3-Harmonica 4-Harmonium The correct answer is Harmonium.