ANS:C - less than

The size of the tetrahedral void in the closest packing of atoms is less than that of the octahedral void. In close packing arrangements, atoms are arranged in layers such that each atom is in contact with the maximum number of neighboring atoms. The tetrahedral void is formed when four atoms are packed together in a three-dimensional arrangement, leaving a space in the center that is smaller than the space formed by six atoms in the octahedral void. Hence, the tetrahedral void is smaller in size compared to the octahedral void.