The vander waal's equation for a gas is `(p + a/V^(2))(V - b) = nRT` where p, V, R, T and n represent the Pressure, Volume, universal gas constant, absolute temperature and number of moles of a gas respectively, where a and b are constants. The ratio`b/a` will have the following dimensional formula

Options

A. `M^(-1) L^(-2) T^(2)`
B. `M^(-1) L^(-1) T^(-1)`
C. `ML^(2) T^(2)`
D. `MLT^(-2)`

Answer

A