Answer: The correct answer is Ideal gas.
An imaginary gas which perfectly obeys gas laws is called as an ideal gas. It is a hypothetical gas whose molecules do not occupy any space and have no interactions among themselves.
According to the combined gas laws-
Where,
P = Pressure of gas
V = Volume of gas
n = Number of moles
R = Gas constant
T = Temperature
Ideal gas perfectly obeys the gas law. Thus, the correct answer to the question is Ideal gas.