$X$ and $Y$ are two covalent molecules in which the hybridization of the central atoms is the same,but the shapes are different. What are $X$ and $Y$?

• A
  $XeF_4, NH_3$
• B
  $XeF_2, PF_5$
• C
  $BF_3, H_2O$
• D
  $CH_4, BeCl_2$