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1. There are two identical organ pipes with same length and same diameter. One is closed at one end while the other is open at both the ends. The quality of sound is superior in the open-ended pipe due to the?
(A): absence of harmonics
(B): presence of two harmonics; both even
(C): presence of two harmonics; both odd
(D): presence of twoharmonics; one odd and the other even
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