Which of the following is Virial equation of state?

A. $$\left( {{\text{p}} + \frac{{\text{a}}}{{{{\text{V}}^2}}}} \right)\left( {{\text{V}} - {\text{b}}} \right) = {\text{nRT}}$$

B. PV = nRT

C. $${\text{PV}} = {\text{A}} + \frac{{\text{B}}}{{\text{V}}} + \frac{{\text{C}}}{{{{\text{V}}^2}}} + \frac{{\text{D}}}{{{{\text{V}}^3}}} + \,...$$

D. None of the above

Answer: Option C