X and Y are oxides of two different elements. When X is added to water, it forms aqueous solution Z. Z causes universal indicator paper to turn blue. An aqueous solution of Y reacts with sodium carbonate and gives off carbon dioxide gas. Which statement is correct?
- AX and Y are both the oxides of metals.
- BX and Y are both the oxides of non-metals.
- CX is the oxide of a metal and Y is the oxide of a non-metal.
- DX is the oxide of a non-metal and Y is the oxide of a metal.