The water table in an aquifer extending over an area of 150 ha is dropped by 2.0 m. Given that the porosity and specific retention are 35 percent and 10 per cent respectively. the change in ground water storage should be equal to _____________

A

3,00,000 m$$^3$$

B

7,50,000 m$$^3$$

C

9,50,000 m$$^3$$

D

10,50,000 m$$^3$$