Select the incorrect statement in a CsCl crystal:
A. `Cs^(+)` forms a simple cubic lattice, `Cl^(-)` forms a simple cubinc lattice
B. `Cl^(-)` occupies body centre of `Cs^(+)`
C. `Cs^(+)` occupies body centre of `Cl^(-)`
D. It is impossible for `Cl^(-)` to occupy body centre of `Cs^(+)` because the body centre void of `Cs^(+)` is smaller than `Cl^(-)`
