A 2.844 g binary salt (X) of a univalent metal reacted completely with 0.642 g of sulphur in an evacuated sealed tube to give 3.486 g of a white crystalline solid (Y). (Y) forms a hydrated double salt (Z) with `Al_(2) (SO_(4))_(3)`. Therefore

Options

A. (X) is `KO_(2)`
B. (Y) is `K_(2)SO_(4).Al_(2)(SO_(4))_(3).24H_(2)O`
C. (Z) is `K_(2)SO_(4)`
D. (Y) is `K_(2)SO_(4)`