Thermal Properties Of Matter

From the ideal gas law, PV=NkT \implies \dfrac{N}{V}=\dfrac{P}{kT} Density of gas= \dfrac{Nm}{V}=\dfrac{Pm}{kT}

Question

A given sample of an ideal gas occupies a volume V at a pressure P and absolute temperature T. The mass of each molecule of the gas is m. which of the following gives the density of the gas?