A sonometer wire resonates with a given tuning fork forming ` 5` antinodes when a mass of `9 kg` is suspended from the wire . When this resonates with the same tuning fork forming three antinodes for the same positions of the bridges . The value of `M` is
A. `25 kg`
B. `5 kg`
C. `12.5 kg`
D. `(1//25) kg`