$Xe_{(g)}$ and $F_{2(g)}$ react in the ratio $1:20$ at $573 \ K$ and $60-70 \ bar$ to form $A$. When $A$ is completely hydrolyzed,$B$ and $HF$ are formed. $A$ and $B$ are respectively:

• A
  $XeF_2, O_2$
• B
  $XeF_6, XeO_3$
• C
  $XeF_4, XeOF_4$
• D
  $XeF_4, XeO_2 F_2$