An equation of real gas (p-a/v^2)(v-b)=RT then dimension of (a/b^2) is

Question

An equation of real gas \((p-\frac{a}{V^2})(v-b)=RT\) then dimension of \((\frac{a}{b^2})\) is 

P : Pressure V = Volume R = Gas constant T = Temperature

(1) [ML^–1T ^–2 ] (2) [MLT^–2 ] (3) [ML2T ^–2 ] (4) [MLT^–1 ]

Answer 1

Answer: (1) [ML^–1T ^–2 ]