Which of the following is not formed when $\;H_{2}S\;$ reacts with acidic $\;K_{2}Cr_{2}O_{7}\;$ solution ?

Question

$(a)\;CrSO_{4}\qquad(b)\;Cr_{2}(SO_{4})_{3}\qquad(c)\;K_{2}SO_{4}\qquad(d)\;S$