The question refers to a reaction scheme to identify compounds $X$ and $Y$, but the actual reaction diagram/details are missing from the prompt. Also, the option contents for A, B, C, and D are blank.

So, it is not possible to truly derive $X$ and $Y$ from the given information.

What is missing

1. The reaction sequence/image.
2. The structures or names in options A, B, C, and D.

Without these, no chemical analysis can be performed reliably.

Comparison with stored answer

The stored correct answer is given as C, but since the reaction and options are absent, I cannot independently verify whether option C is correct.

Therefore, I must disagree with the stored answer on the basis of insufficient information, not because C is necessarily wrong.