The Density of the Vapor of Allicin, a Component of Garlic,Is

Multiple Choice

The density of the vapor of allicin, a component of garlic,Is 1.14 g.L^-1 at 125 ^$\omicron$ C and 175 Torr.What is the molar mass of allicin?

A) 21.6 g.mol^-1
B) 50.8 g.mol^-1
C) 273 g.mol^-1
D) 869 g.mol^-1
E) 162 g.mol^-1