Given below are two statements:
Statement-$I$: Element '$X$' and '$Y$' are the most and least electronegative elements,respectively,among $N, As, Sb$ and $P$. The nature of the oxides $X_{2}O_{3}$ and $Y_{2}O_{3}$ is acidic and amphoteric,respectively.
Statement-$II$: $BCl_{3}$ is covalent in nature and gets hydrolysed in water. It produces $[B(OH)_{4}]^{-}$ and $HCl$ in aqueous medium.

• A
  Both Statement-$I$ and Statement-$II$ are true.
• B
  Statement-$I$ is true but Statement-$II$ is false.
• C
  Both Statement-$I$ and Statement-$II$ are false.
• D
  Statement-$I$ is false but Statement-$II$ is true.