An iron load of 2 kg is suspended in air from the free end of a sonometer wire of length 1 m. A tuning fork is : (Specific gravity of iron=8)

Question

\[\begin {array} {1 1} (a)\;\sqrt 8 & \quad (b)\;\sqrt 6 \\ (c)\;\frac{1}{\sqrt 6} & \quad (d)\;\frac{1}{\sqrt 8} \end {array}\]