(B)
The ideal gas law assumes that there is no intermolecular attraction and that the volume of the gas molecules is insignificant relative to the space between the molecules. Therefore, gases that are large molecules and/or demonstrate strong intermolecular attraction are likely to be nonideal gases. Hydrogen sulfide is both the largest gas molecule of the options and shows very strong intermolecular attraction because of the difference in electronegativity between hydrogen and sulfur. Water vapor also shows strong intermolecular attraction, but it is a much smaller molecule.