Among the following pairs of compounds, the one that illustrates th...

Among the following pairs of compounds, the one that illustrates the law of multiple proportions is

A. \(\mathrm{NH_3}\) and \(\mathrm{NCl_3}\)

B. \(\mathrm{H_2S}\) and \(\mathrm{SO_2}\)

C. \(\mathrm{CS_2}\) and \(\mathrm{FeSO_4}\)

D. \(\mathrm{CuO}\) and \(\mathrm{Cu_2O}\)