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An object of mass m is suspended at the end of a massless wire of length L and area of cross -section A. Young modulus of the material of the wire is Y. If the mass is pulled down slightly its frequency of oscillation along the vertical direction is :

A

`f = 1/(2pi) sqrt((mL)/(YA))`

B

`f = 1/(2pi) sqrt((YA)/(mL))`

C

`f = 1/(2pi) sqrt((mA)/(YL))`

D

`f = 1/(2pi) sqrt((YL)/(mA))`

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