A sphere contracts in volume by 0.05% which taken to the bottom of sea 500m deep.Find bulk modulus of sphere.

Question

$\begin{array}{1 1}(A)\;9.8\times 10^{10}\\(B)\;9.8\times 10^9\\(C)\;4.9\times 10^{16}\\(D)\;\text{None}\end{array} $