Which of the following is not true about the voids formed in 3 dimensional hexagonal close packed structure?

Which of the following is not true about the voids formed in three dimensional hexagonal close packed structure?

Which is not true about the voids formed in three dimensional hexagonal close-packed structure-

which of the following is not true about the ionic solids ? (a)Bigger ions form the close packed structure (b)smaller ions either occupy the tetrahedral or the octahedral voids depending upon their size (c)Occupation of all voids is not necessary (d)the fraction of octahedral or tetrahedral voids occupied depends upon the radii of the ions occupying the voids

Which of the following are not true about hexagonal close packing ?