The correct option is D 400 g/mol
Let's consider that the compound contains 1 atom of S per molecule.
We know that, the molar mass of sulphur is 32 g
Given:
100 g of the compound contains 8 g of sulphur.
Mass of the compound that contains 1 mole of sulphur = molar mass of the compound = 100×328=400 g/mol