The ${\mathrm{r}}_{+}/{\mathrm{r}}_{-}$ ratio of ZnS is 0.402. Pick out the false statements of the following 

ZnS is 4: 4 coordination compound. 

ZnS does not crystallize in rock salt type lattice because ${\mathbf{r}}_{+}/{\mathrm{r}}_{-}$s too small to avoid overlapping of ${\mathrm{S}}^{2-}$ ions

${\mathrm{Zn}}^{2+}$ ion is too small to fit precisely into the octahedral voids of S^2- ions

${\mathrm{Zn}}^{2+}$ion is too large to fit into the octahedral voids of S^2- ions.