A hydraulic jack is used to compress a spring as shown in the figure.Stiffness of spring is $$10^{5}$$ N/m By applying a pressure ‘p’ in the hydraulic cylinder, the spring gets compressed by 10 mm. The cross sectional area of the piston is 25 $$cm^{2}$$. The applied pressure‘p is

A

$$4 \times 10^{5}$$

B

40 Pascals

C

250 Pascals

D

25 Pascals