A liquid compressedi in cylinder has a volume of $$0.04 m^3$$ at $$50 kg/cm^2 and a volume of $$0.039 m^3$$ at $$150 kg/cm^2$$. The bulk modulus of elasticity of liquid is

A

$$400 kg/cm^2$$

B

$$40 \times 10^6 kg/cm^2$$

C

$$40 \times 10^5 kg/cm^2$$

D

$$4000 kg/cm^2$$