1.

Which of the following statements is true-

Answer»

in hexagonal close-packed arrangement of spheres, the spheres of the first and FOURTH layers have the same VERTICAL alignment
in cubic close-packed arrangement of spheres, the sphere of the first and THIRD laters have the same vertical alignment
in cubic close-packed structure, the fifth LAYER repeats the SECOND layer
hexagonal arrangement in three dimensions is less closely-packed than the cubic arrangement

Answer :C


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