Which of the following statements illustrated the law of multiple proportions?

Options

A. 3.47 g of `BaCl_2` reacts with 2.36 g `Na_2SO_4` to give 3.88 g `BaSO_4` and 1.95 g NaCl
B. Hydrogen sulphide contains `5.89%` hydrogen, water contains `11.1%` hydrogen and sulphar dioxide contains `50%` oxygen
C. An element forms two oxides, XO and `XO_2` containing `50%` and `60%` oxygen respectively. The ratio of masses of oxygen which combines with 1 g of element is 2:3
D. All of the above

Answer

C