Lattice points per unit cell for the given figure are as follows: (i) We have eight corners and each corner is shared by eight other unit cells, the lattice point at corner has share towards one unit cell is 8×
1
8
=1 (ii) There are six faces in a cubic unit cell and we have one sphere at the center of each face. Each face is common between two unit-cells. Thus, contribution of each sphere per unit cell is6×
1
2
=3 Hence, there are 1+3=4 lattice points per unit cell in the given figure. ∴(c) is the correct option.