How is compressibility factor expressed in terms of molar volume of the real gas and that of the ideal gas ?

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement -I: Compressibility factor is defined as the ratio of molar volume of real gas to the molar volume of ideal gas. Statement - II: The compressibility factor (Z) at critical state is 1

For an ideal gas, compressibility factor is

The compressibility factor for an ideal gas is

The compressibility factor for an ideal gas is