`[X]+H_(2)SO_(4) rarr [Y]` a colourless gas with irritating smell `[Y] + K_(2)Cr_(2)O_(7) + H_(2)SO_(4) rarr` green solution `[X]` and `[Y]` are

Options

A. `SO_3^(2-), SO_2`
B. `Cl^-, HCl`
C. `S^(2-), H_2S`
D. `CO_3^(2-), CO_2`

Answer

A