Correct statement(s) about the compounds $$\mathbf{X}$$, $$\mathbf{Y}$$ and $$\mathbf{Z}$$ is(are)

A

$$\mathbf{X}$$ is used for sterilizing drinking water.

B

$$\mathbf{Y}$$ has a planar structure.

C

$$\mathbf{Z}$$ is used in the enrichment of $$^{235}\mathrm{U}$$.

D

$$\mathbf{Y}$$ is a stronger Lewis base than ammonia.