A gas X is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colourless gas Y. Identify X and Y.
A. `X = CO_(2), Y = Cl_(2)`
B. `X = Cl_(2), Y = CO_(2)`
C. `X = Cl_(2), Y = H_(2)`
D. `X = H_(2), Y = Cl_(2)`
