**The work done by a gas molecule in an isolated system is given by, W = α.β ^{2}.e-x^{2} / αkT, where x is the displacement, k is the Boltzmann constant and T is the temperature.α and β are constants. Then the dimensions of β will be**

a. [M^{0}LT^{0}]

b. [M^{2}LT^{2}]

c. [MLT^{–2}]

d. [ML^{2}T^{–2}]