$A$ spherical ball of volume $2000 \text{ cm}^3$ is subjected to a hydraulic pressure of $15 \text{ atm}$. If the change in volume is $5 \times 10^{-2} \text{ cm}^3$,the bulk modulus of the material of the spherical ball is (Given: $1 \text{ atm} = 10^5 \text{ Nm}^{-2}$)

• A
  $6 \times 10^{10} \text{ Nm}^{-2}$
• B
  $2 \times 10^{10} \text{ Nm}^{-2}$
• C
  $5 \times 10^{10} \text{ Nm}^{-2}$
• D
  $15 \times 10^{10} \text{ Nm}^{-2}$