In $CsCl$ structure,the coordination number of $Cs^{+}$ is

• A
  Equal to that of $Cl^{-}$,that is $6$
• B
  Equal to that of $Cl^{-}$,that is $8$
• C
  Not equal to that of $Cl^{-}$,that is $6$
• D
  Not equal to that of $Cl^{-}$,that is $8$