Which of the following statement is incorrect?

Options

A. A real gas can be liquified,if applied pressure is more than its critical pressure and its temperature is more than its critical temperature
B. A temperature above which a substance can exist in gaseous state only is called as uts critical temperature
C. If two gases are having same value 'b' but different value of 'a' then the gas with larger 'a' will occupy more volume under similar conditions
D. A real gas obeying van dar walls equation will resemble ideal gas if the constant 'a' and 'b' are very small