What is the molecular mass of an ideal gas with pressure 1 atm, and density 10 g/L at temperature $27^{\circ}C$?

Question

$\begin{array}{1 1} (a)\; 84.5\; g \\ (b)\; 135.1\; g \\ (c) \;186.8\; g \\ (d) \;246.3\; g \end{array}$