Under constant tension and constant mass per unit length, the note produced by a plucked string is \(500 \mathrm{~Hz}\) when the-length of the wire is \(0.9 \mathrm{~m}\). At what length is the frequency \(150 \mathrm{~Hz}\) ?

A. \(3 m\)  
B. \(0.27 \mathrm{~m}\)
C. \(8.33 \mathrm{~m}\)
D. \(6740 \mathrm{~m}\)

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Correct Answer: A