When $FeCl_3$ is added to an excess of hot water,it gives a sol '$X$'. When $FeCl_3$ is added to $NaOH_{(aq)}$ solution,it gives a sol '$Y$'. The sols '$X$' and '$Y$' formed in the above processes respectively are:

• A
  $Fe_2O_3 \cdot xH_2O / Fe^{3+}$ and $Fe_2O_3 \cdot xH_2O / OH^{-}$
• B
  $Fe_2O_3 \cdot xH_2O / H^{+}$ and $Fe_2O_3 \cdot xH_2O / Na^{+}$
• C
  $Fe_2O_3 \cdot xH_2O / Cl^{-}$ and $Fe_2O_3 \cdot xH_2O / OH^{-}$
• D
  $Fe_2O_3 \cdot xH_2O / Fe^{3+}$ and $Fe_2O_3 \cdot xH_2O / Cl^{-}$